I'm still only Diamond. Hit Champ for a few games once. Not even long enough for the season rewards. Those hours aren't me leaving the game running either. If the game is running, I'm either playing a game or training.
Lol, it hurts that I'm no longer champ. The skill curve has definitely ramped up though, so being Diamond is not a bad thing. It's my fault for taking a three year break and expecting to come back as good as I was.