Having an extended cast of characters rotating to fill the spots in your party in no way needs to imply that the ones you are not carrying around full time spent all their waking hours masturbating behind a rock
LOL. Pretty much this. But there's definitely place for improvements in this area regardless if we look at BG2 or DOS2 or...actually any other RPG I've played.
Alt+ left click in the inventory on an item while the camp stash is opened transfers the item there. Make it a reality.