Limit pickpocketing in general through multiple methods IMO. Generally speaking, it's not a very compelling action to take in D&D, and not being able to steal a person's entire inventory would be a start. Limit it to things that you could reasonably take and limit it by the reactions of your companion characters, maybe some don't care but honestly who wants to be grouping with an outright thief? Obviously there are some exceptions in terms of particular quests or characters but in general when you're playing anything but an evil campaign in D&D (which are fraught with problems themselves) your PCs don't like it when other PCs steal.
Yea but you don't need to steal their entire inventory. Just their gold, over and over and over again. And then you just buy whatever you want from them with their own gold.
Also the rest of your party only seem to approve/disapprove during dialog options or sometimes during cutscenes. I've never seen them do it during actual gameplay. I'm not sure they can. Also, even if they could, since you control the entire party you could simply move them all away where they can't see what's going on and they'd never know what you did.
It may not be as simple as flipping a few lines of code and voila.
Also, I think most of us would agree, there's far more important things for Larian to be focusing on.
