Along those lines, I also wish you could volunteer any party member to become a mindflayer, maybe with a persuasion check
[PERSUASION] Okay, team. Everyone with no soul and/or reflection to loose, raise your hand.
When you talk to the companions about the super tadpole, some will refuse, others will say yes it is necessary. I want to do it. So they seem to know what they are doing.
But when you get to the endgame for the final battle, both emp and orph only want to talk to "the leader". The companion who was ready to sacrifice his soul, and has already turned halfway , is dismissed, just like that.