I'm still waiting until I play to decide but I'm also worried by this. In BG2 I changed companions all the time. Pick up one for the sphere, another for the temple quest, trade him out for the druid grove, kick them out for the ranger cabin . . .

I'm hoping it's BG like where you can move between maps freely and not DOS2 like where each maps was tied to a portion of the game. If we are locked into a sequence that takes away from replay value