I mean, I am honestly sick of playing against Mono Blue, and it's driving me away from the game. Maybe if Artifact wasn't a ded game, then there'd be more movement with the meta, but I can tell you the type of deck I'm playing against from the second round, more often than not, and with Mono Blue, I don't even need to get to second round to know it's - more often than not - "Race to Incarnation", with a couple of Bolt of Damocles in there to finish off. My heart legit droops when I see all blue heroes. :/
More objectively, I don't see why it would hurt in a casual setting. I think of it like allowing CS:GO players to select what type of game they play - some people just don't like bomb defusal maps, and others hate the life out of Office, so why not allow for a decent amount of filtering in casual mode?