gamerprinter
Mapper/Publisher
Hard to say. I do not think Pathfinder 2nd Edition would necessarily need to be backwards compatible as Pathfinder was to 3.X, nor does it necessarily need to maintain as many of the sacred cows.
As such, I think I would be interested to see them move away from Vancian spellcasting to a more point based model, for starters. Perhaps they could also afford to move away from the 3-18 model for stats and into stat # = bonus . I would be strongly tempted to say that they should keep all of the base classes they have, but should reorganize the NPC classes. NPC classes should be weak, not completely uninteresting as they are now. Simplified monsters should be a shoe in. Classwise, I think a big question would be whether to bring psionics back inhouse. Psychic warrior and wilder could probably be ditched or merged into soulknife and psion.
Another big thing: I think that there should be a definitive system for heading into epic levels. It does not need to be fleshed out per se, but it should be completely apparent from the core rules how you would do it.
Honestly, all that would chase me away from Pathfinder 2.0. I'd probably stick with 1.0 if that's the direction Paizo went.
I'm not a fan of spell points, and though many seem to hate Vancian magic system, it's the only one I'm comfortable with - I don't want to see it go.
Psionics and Epic rules - yech, never liked either. I don't allow psionicists in my game, and only did Epic once and it was a terrible experience.
And all my NPCs are generally full classes, as if they were PCs, though I still have commoner/adept/expert/warrior in my game. If there were improvements here, I'm might be interested.
No offense, I can't see any of your recommendations as something I want to see.