I think they were the most fun I had in a while, I hope it comes back again to stay.
The feedback i would give, is make it so build swapping is more accessible in between rounds. When you die you have to go to your hero panel to even swap utilities, its just annoying and inconvenient. I also think once Swiss style tournament is implemented, the 2v2 placements will make more sense. You wont see as many decent duos get memed on by some gimmick and knocked out early due to team comp alone. It also would give a better experience letting players be able to fight more rounds since they are so short also.
That's my thoughts what do you guys think?