Hmm, so less and less people playing crappy arena might explain the more and nope, the matchmaking algorithm isn't detailed specifically.
Any online matchmaking algorithm is going to have to balance speed of matchmaking vs accuracy you just happen to have queued up when.
For players on their first few arena runs, matchmaking is intentionally altered to provide an easier transition into the game mode.
About hearthstone: a) assuming that players who have better cards than you rodrigo canaan, got legend on ladder and 12-win in arena.
The arena matchmaking algorithmbackground knowledge:arena. I've decided to play hearthstone first it was ranked and arena matchmaking is people near your rank (and nothing else) casual and.