Hey, there.
In the vanilla game:
1) Your allies don't feed on their own unless they're in battle or frenzied.
2) I've never seen Serena raise the dead on her own. She's pretty lazy, discipline wise.
3) I've also never witnessed the AI recast a discipline on a target while it was already active.
4) Vampires are supposed to only take half-damage from gunfire. I think vampires weren't getting the bonus to soak, but I'm not 100% sure.
5) A lot of small details bug me, but it mostly comes down to a matter of taste and interest. There are definitely things I would change or add, but not necessarily things I would "fix," you know what I mean?
Good luck.