I’m more surprised by the fact that there are still people playing Mercs. The entire mode was good for about 1-2 weeks after release. Once they nuked progress it was time to run. It’s only reason for existing is to be a quick cash-grab.
It’s a very grindy mode with no depth or creativity. An uninspired version of Rock-Paper-Scissors with a punishing reward system. They even managed to botch the PvP system within it. This should have been an easy no-brainer mode to build upon, but they haven’t. They just continue to add new cards and expect people to keep handing them money for nothing.
As far as CCG’s go, there are a lot out there that do it a lot better than Hearthstone. People stuck with HS because of the whole “It’s F2P. You don’t have to spend money.” theme it had for a short time. Those days are gone. The sooner players accept that fact the better off they will be. It’s okay to try something new and move on to greener pastures.