True. They do come up. As long as they're like this, though; presented as an idea for alternate uses, i don't mind too much. It's all the nerf whining that bugs me.
Playing at higher levels you see just about every okay card become OP given the right circumstances, and you see those counters.
People just aren't good at losing to a counter deck anymore. I run a mega grow. Deadly (twi), and gravestones pick me apart, but to call them op would be wrong. They're just well suited to counter my style of play.