You would have to have all your characters within a 200 or xxx elo of eacother that you can potentially swap with another…
You check your rolls pre match and get queued to whatever queues first, then if someone else also is in a similar situation as you where they decide they want to switch and follow the guidelines of having their preselected characters prematch within the right elo. then there would be another option in match to do a quick swap if both parties agreed.
this would fix alot xD
u could only swap if ur good enough too, and it would encourage other players to be able to do the same.