I'm no coder, but if the source code is available, would that allow PRC to be integrated directly into the game? Thus skipping external character creator. I'm well aware that modules need to be unpacked and get PRC resource injected to have them available.
Would possibilities such as stacking metamagics be possible?
Creating new metamagics such as heightened
Have the extra base classes selectable in ingame character creator?
Make all cases where you are forced to use PRC spellbook to use normal spellbook and have all properties working, going into thrall of Grazzt or Arch Mage choosing extra spell DC currently forces player to use PRC Spellbook which is a pain to check through every spell description, I'd really like if exchanging spells and the like to work as in vanilla.
I imagine results of this to also make the Archivist play very much like a Wizard with the interaction of the game's spellbook mechanic.
I wouldn't be surprised if combat manuvers and the likes abilities were implemented using the vanilla spellbook, not mention many alternative casting classes, perhaps it would be even possible to make custom spellbooks for different classes without using the functionality of the current PRC spellbook which takes a while to get through as well with page changes and so on.
If things can change so much, also makes me wonder if integrating some Pathfinder modifications would be a welcome addition, mainly imagining things from the game Pathfinder Kingmaker, but several things from Pathfinder 2nd edition could be squeezed in, I find the separate spell lists interesting along with sorcerer bloodlines
https://2e.aonprd.com/Bloodlines.aspx?ID=, ancestry mechanics, magic tattoos and so on.
Companion wise perhaps you could select them and gain full control over them as if they were your man character while enemies can only be selected for attacks and targets. You could manually cast and queue spells as your companions giving you a much higher grade of control.
I wonder what things I can realistically hope for, many times although many ideas might be good they have usually been impossible to implement or no one wanting to do big changes
I seem to have misunderstood, the Xeros project seem to aim at re-implementing existing games by porting over the content, but seems quite unfinished.