I like all these ideas you guys are spitballing. Honestly though, what I'd want out of RWBY if I still cared would be for it to return to its roots as a series where the story is just an excuse to watch cool anime characters in OTT fights, none of this fake deep plot shit. Even in V1 with Monty on board, his writing and worldbuilding was still very 'stock anime tropes'. I think he needed an editor or someone to reign him in and properly direct him with the other staff, I remember a lot of shit like Monty sneaking in that entire piece of animation for V2's stinger where Yang finally meets Raven unmasked which the other writers weren't aware of at the time. When you do things like that, you are asking for plotholes to pop up - how is a team supposed to make a quality story when one of its members keeps introducing random shit? Doesn't matter if he's the original creator, tons of 'geniuses' must get their efforts cut and rearranged by their editors all the time.
I get the impression Monty withheld a lot of his ideas (unwittingly or not) from the others like this which is why we have such a mess with everything post V3 because interpreting a dead man's notes is not the same as him telling you his direction, like what he wants with the Maidens, and planning it with you. We're so far into the future now it seems like they dropped all pretense of working with whatever he left behind - M+K are basically making original DARK fanfic flavour nonsense with the remains of a series that was half baked anyway.