I am very skeptical that these changes are going to improve Ogryn in any substantial way.
Reading through the changes, there's a couple of nice things like the addition of Outta My Way! and Bull Rush now counting as dodging, though I'm not sure how impactful Outta My Way! is going to be on higher difficulties. You also have the changes to rocks which I am very happy about.
But as I read though the changes, most of them just don't seem substantial enough to make playing Ogryn worth it. The nerfs to The Best Defense and Smash 'Em! are pointless, just as they were with the last update, so I don't know why they are nerfing the talents yet again. From what I can tell and what people who play more Ogryn than I have told me, Gunlugger is getting eviscerated despite that build only really being useful for the boss damage gimmick. Feel No Pain's change is probably going to end up not mattering on high difficulties, and would still not be worth running compared to Heavy Hitter. And Heavy Hitter's changes just seem to reinforce that there is never any reason why you would take BLO or FNP over it.
A friend made a comment along the lines that the Ogryn changes are great for all the players out there who are stuck in malice, and I really do think this is the case. It reminds me a lot of the problem Deep Rock had in the past, where GSG would make balance changes that balanced the game around Hazard 3 because that was the difficulty they played. That was great for all the players who only played Haz 3, but for anyone who played Haz 5 and regularly did the Elite Deep Dives, these changes were inconsequential to downright detrimental, which I believe is what caused GSG to eventually implement the extended difficulty modifiers for Haz 5 into the base game. From what I've been told, most, if not all, of the testers Fatshark employs specifically play on malice when testing changes, so it wouldn't surprise me if it was a similar situation. I've also heard rumors that Hank, author of the Ogrynomicon, had a hand in the changes to Ogryn, and if so that would perfectly explain why most of these changes are ultimately mediocre (just like his guide lol owned)
Ultimately I don't think these changes will have the impact Fatshark is hoping for - the meta will still be running a pickaxe, using Heavy Hitter, using Bull Rush, your choice of either rocks or the big grenade, and the Kickback, and you will still need to put in more effort to achieve what the other classes can do with half the effort. I will be very surprised if these changes end up playing out better than I expect.
As for Havoc, I am fully expecting one of the four "new" mutators mentioned is just going to be the brute conscripts shit they were running a while back. Havoc already just kinda sucks ass to play anyways unless you have a premade team and/or are going for the penances, so not much hope here.
The Mortis Trials thing that's being added doesn't have any relevance to me. If I wanted to play a roguelike/roguelite/whatever the fuck, I'd go play Isaac or Risk of Rain, but that's just me.