That’s the best “quality of life” improvement you could make right now.
After you mentioned it in a TWAB I thought you were fixing this bug, but no it still doesn’t let you back out of matchmaking properly after a game, the UI isn’t there and it sometimes sucks you into “just one more” when the matchmaking ends before the UI returns.
Then obviously fix matchmaking in general so it’s not mostly stacked verses averages or laggy verses good, every match.
Do it, you won’t!
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You can already? If you want to back out with no penalty after a match has started that's a hilariously dumb thing to suggest