It's weird how few people actually play solo standard. Granted, I usually only play in Europe, but still, I'm thinking of giving up on that mode given that matchmaking will likely be worse and I guess I might as well play against a team, since that would be more normal for tourneys (not that I'll likely ever enter one). Plus you can get a group of no teams even in standard 3v3.
It's all I play and never had an issue with matchmaking just yet. I'd probably be done if it went away, unless it was replaced with ranked labs or something.