I had a couple things that have come up while playing that could use some qol love:

1. Trade/Barter screen - it'd be nice if you could have a single window that showed all the items in the party and you could just trade from that window instead of having to go through each of the characters to do individual trading. Along the same lines of this would be the ability to have a character selected to be able to compare the gear they're wearing with the items in the vendor's stash. It's a bit of a pain to have to remember what gear everyone is currently wielding to determine if the vendor is selling an upgrade for them. And then you'd have to swap to your character with the best CHA stat to get the best deal (this rolls in to the next suggestion). I also haven't seen the ability to click on a "sell all wares" button to sell all the junk items you've flagged as such.

2. Best character for skill checks - any player that's going to want to maximize their success chances for interactions is going to quick save, start the interaction and find out which skill checks are going to be needed. Then they'll load the game and start it with the character that'd have the best chances to succeed. Why make the players do this? Why not allow the player to simply select the character that's making the attempt or always default it to use the character with the highest chance? And for the purists that want only their main character to do all the interactions, this feature could be an option that can be turned off (or if going the selectable route, they could always just select the main character).