For turn-based maybe. But with RTwP an AI with at least moderate awareness is a good thing to have, or you'll end up playing in the "P" part forever.
This isn't how people played the IE games? I hated dealing with the scripts myself.
Controlling every character in party based RPG is like playing six hands of poker by yourself against yourself. Or at least that's how it felt for me.
When I play RPG I want to play with one character, my character.