Your theory is a bit retarded, you saying it all over again won't make it not retarded somehow.
It isn't retarded; it's the truth. The people who owned 40K from the start were always left-leaning, and thinking that it would become this conservative funland just because a good number of fans loved the Imperium and thought it was ''based'' was always stupid.
This is just how Lucas intended the Rebels to be vietcong, but their ww2 american aesthetics, the Empire being too nazi, made them into le chungus american freedom revolutionaries, with disney later making them into the BLM resistance. BLM and vietcong are two different beasts.
At least with George Lucas, when he was in charge of Star Wars, he welcomed dissenting opinions in the SWEU and allowed for works that depicted the Empire, the Mandalorians, the Separatists, the Sith, and other enemies of the Jedi to be depicted in a sympathetic light. He allowed authors for works like TIE Fighter, Republic Commando, SWTOR and other works to make the movies' antagonists look good while shitting on the Jedi. Lucas himself saw the Jedi as heroes, but he had no problems hiring the likes of Karen Traviss and letting her write anti-Jedi propaganda. Contrary to GW always saying that the Imperium represents the worst of humanity, Lucas described the Empire as ''good people working for a bad man'' when asked by a kid if the Stormtroopers were the baddies.
GW has always stood by the idea that the Imperium is a satire of fascism, and that trying to depict them in a sympathetic light is a misunderstanding. Even Matt Ward's Ultramarines stand in stark contrast to the rest of the Imperium; their Ultramar is an island of order and efficiency in a sea of decay and despair that is the rest of the Imperium, hence why Matt Ward praises them to the detriment of everyone else in the Imperium. And GW's recent statements on the matter reinforce that idea; that the Imperium is evil, that it's basically a satire of fascism and religious extremism, and that thinking they're somehow the lesser evil or the good guys is wrong.
That with the resurrection of Guiliman they are suddenly course correcting to a more heroic sort of GiJoe thing is a whole other topic.
What's hilarious is that they are trying to make the Imperium to be the good woke guys, instead of the thatcher evil conservatards they were originally meant to be.
As for the Imperium going good guy/GI Joe, I foresee that it will be restricted to Imperial factions considered ''sympathetic'' like the Ultramarines. After all, the Leftists that GW are trying to placate with these lore changes wish to hang on to the idea of the Imperium being a satire and being a hellhole. Although that might change soon, since Sabbathiel from the Iron Will comics was brought back as an Inquisitor who now acts with the Emperor's will, so maybe down the line the rest of the Imperium can reform, too, if even members of the Inquisition are getting a thumbs-up from that fedora-tipping retard that GW obviously wants to show as logical.
But even so, the Imperium becoming ''good'' would probably have it become less religious and more atheistic or progressive as time goes on. Such progressive changes would probably have a good-guy Imperium constantly denounce what they once were, kind of like how the Brotherhood in Fallout 4 chides the Fallout 3 Brotherhood for doctrinal differences. The ''Imperium Eterna'', which is the in-universe word for the Imperium from 3rd-7th edition 40K, will always be considered evil by GW.
Custodes like knights are cursed. They will either be OP y UP, but due to how hard they skew, it's almost impossible to get them "right". Should be removed outright from the game or as a very conditional one of in certain imperial armies, but the genie is already out of the bottle, so good luck taking that back.
There should just be an ''imperial'' faction with the guard and the Sisters as the regular units, the Space Marines as the elite units, and the Custodes, Grey Knights, and Primarchs as the super-elite units. Even for Space Marine factions, they have their own self-sustained militaries complete with their own soldiers who serve below the Space Marines.
This was what was really noteworthy, Goonhammer, kings of the cucks, never even mentioned the femstodes thing in their review, they were too busy shitting on how BAD the rules were. Custodes has been a horrible release and the numbers seem to confirm it. At least till 11th or a dataslate makes them op again and the cycle starts again.
This is what happens when you have an ''elite'' unit that gets too hyped up in the lore. You bring them to the tabletop and either they'll be too OP for a balanced game, or you can't properly represent their power in the lore through the tabletop game. The former pisses off the people who play against them, the latter pisses off the people who play as them. Why the hell would I play Custodes when they're not as strong in the Tabletop as they are in the lore, when I can easily play as the other factions for a more practical army?
Other games don't have this problem. The Pokemon TCG, for example, properly represents powerful Pokemon along with their strengths and weaknesses, making it so that the powerful Pokemon not only can hit hard and take a beating, but they'll also have resistances to certain types of attacks. But they are very rare, and most of the powerful Pokemon have to be evolved from the weaker, more basic Pokemon, so it's not that easy to bring them to field.
The Custodes have always been rather over-hyped in my opinion. We've never seen them actually fight in film or animation, and most of their elite combat ability comes from the lore, which has always been shaky since GW absolutely refuses to commit to a canon, which is frustrating.
But you run into the immediate retardation of "why would you breed the women for battle when men are more efficient always". Only way you justify women in military in a "realistic context" is them being something like Ogryn or ratling where they are their own stable mutation of a human where they are the equivalent of Mantis where the females are bigger and stronger than the males (and eat them, tap into that vore market while you are at it). Of course going realism is kind of pointless and I've seen enough girls wielding gigantic hammers in my weeb shit to know that it's usually not relevant in sci fi and fiction, so it's probably best to not bother explaining it and just have some extra female heads here and there and not go into detail on why Sororitas get to have top tier equipment like servoarmor and bolters while even the most elite Imperial Gaurd get caparace armor at best. Basically, never explain rule of cool, it never ends well.
I suppose you can say that they come from a planet where women have mutated to be stronger than the men there. Yes, kind of like the Mantis.
Not to mention that the excuse for their existence, the law that says the Church not being allowed to field men at arms, has been broken in spirit by the existence of the Sororitas. Maybe the Imperium thinks they can control the Church better by having its armies be made up of what is usually considered to be the less physically-strong sex, but the original intent of the law is that the Church wasn't allowed to arm itself PERIOD, and the Sororitas are just taking advantage of a legal loophole that goes against the spirit of the law. They might as well get rid of that law outright and bring back the Frateris Templar.