Allow players to concede a BO3 match at any point after game 1.

It's a waste of time and/or simply unfun to play against a deck without interaction, a player that displays chronic unsportsmanlike conduct, or a circumstance such as a crash+de-sync forces one player to be AFK for an extended period of time.

I don't want to be unsportsmanlike and make my opponent sit through the full sideboard time-out + in-game time-outs.

Echoing themes of earlier posts, please enable this basic sort of interaction primitive that we take for granted in IRL matches.