It's still exploitable in the battlehall. People enter the matching queue and simply cancel the queue if theirs doesn't pop at the same time as their desired opponent. There's also a limit on only playing the same opponent 1 time which can be circumvented by leaving the instance and rejoining, then you can play the same opponent again. I've seen people cancel the pop repeatedly, clearly fishing for a certain opponent. But yeah it looks like cheatsy activity decreased since they changed up the format and tbh I wouldn't win tournaments if everyone played fair anyway because I'm pretty bad against human opponents o.o
