I'd rate this a 5 except as many people have stated, the new update change to co-op has ruined a once fun game. The new mode should have been an extension to the already implemented co-op and pvp modes. The new co-op is unbalanced, a single poor roll can ruin an entire run, wasting valuable keys. The company has responded to multiple reviews stating you can play with friends/clan when you run out of keys, but that doesn't change the core problem that co-op now sucks. Bring back the old co-op.