I loved Other M. There were a couple of things wrong with it, like what you mentioned, but I still loved it. What I wish they had done differently, was the concentration. I liked how it worked with health. However, I think it would have been much better if your missiles didn't completely regenerate every time you used concentration. Maybe restore 1, or 5, at most. That, by itself, would have turned up the difficulty a bit too much. So, Missile drops should definitely return.