I played this game mode a lot since launch, especially PVP. Last month, I managed to reach on 14.000 MMR, but Valeera ruined the battles. Now, I'm doing only the daily tasks and playing PVP until I reach 3 wins every day, for the coins.
I have ALL mercenaries maxed up, except Vanessa Vancleef, and about 80 closed packs. I think I also completed almost every task for each mercenary. Yes, I'm silly. But Hearthstone is the only game I play nowadays, exclusively on smartphone, and I was not enjoying Standard at all (first quests, now Roguestone).
I hope the nerfs bring me back to normal Hearthstone and maybe I'll play Battlegrounds again when the budies system cames out. But as long Valeera remain untouched, I don't wanna play a game which is decided on the first turn with a coin flip (Grommash + Valeera).