I can somewhat tell if something is OP or not by watching streamers play. I don't call cards OP because I'm salty and I acknowledge playing OP cards as well myself.
There are no OP cards though, a few bad cards yes but none of the current cards stand out is particularly strong. These are all negative QQ threads that this post is pointing out. Street fighter 2 and star craft don't need patches, people know how to make adjustments and adapt to the game to win without the need for patches. This game doesn't need arbitrary patches either. It's bad enough the paladin sword and deck of lunacy got nerfed merely weeks out of the gate. People have a learn to play issue and a complaining issue currently in this game.