I would also add redeploying characters when you bring more than 6 member to a dungeon run is wonky. Dragging a new character into a position already filled only work sometimes (meaning it fails over 80% of the time). So I don't know if rearranging active combat member is bugged, or if I'm going at it wrong and only when the member gets replaced is when the bug happen.
I would suggest add some way to easily turn active members inactive. Maybe a right click, or maybe a button to one click dissolve the entire combat party for us to rearrange characters.