I think it would be really cool if you could get NPC's in your group, that was sort of self sufficent and there is no need to micro manage them so much, and that they can explore/interact with their enviroment aswell, even whilst following you, maybe when you visit a town they can go and check some places and maybe make comments on them, etc. Make them feel more 'alive' so to speak, instead of them being dead followers shooting what you shoot (and sometimes bursting your own ass)