Battletag: s3dralius#2350 Region: EU Trade Only?: Yes, you go first
I would like to say that Ysera is not OP imo because it's a 9 mana card with good stats and great potential, however in late game almost all other classes will either have won the game or have board clears to deal with the board. Additionally, please note that current problem is in the card generation that the game offers to the players. For example, lackeys are a big problem because they can generate cards that can change the game and you can't do anything to prevent that or play around it.
So, imo they would slightly nerf cards that generate other cards for 0 mana (like alex, or rogue gala and staff) and then make the randomness less so games won't be decided of the rng so much (Reno passive hero power or yogg's box) and instead it will have some sense to play cards that counter your opponents play or need to be played to take the tempo or the board back.
If I was a designer of the game, I will definitely look towards that direction and not printing more cards that will generate more rng to the game which destroys any strategy or plan that any deck can offer to the players.