Ok I don’t think this will be a very popular one, but I would prefer for there to be mirror matches being included. I am tired of matches where either the enemy side easily wins or my side easily wins. Neither is fun, but both seem to be far to common lately. I think more matches than not one side is nearly completely silver ranks and the other nearly fully gold.
Having the side that has way more players have matches against itself, would allow the matchmaker to do something with all the high level players that one side has more than the other and put up matches with them.
Either that or increase time till the matchmaker is ok with making unfair matches considerable. Tho this would likely mean that one side has extremely long waiting times to find a match.