I'm in exactly the same situation and I have the exact same views as you do.
I still raid as MM, because I can. Fun is more important these days, for all of our raiders. We only do normals anyway, so it doesn't matter much, a dead boss is a dead boss, regardless of specs. That being said, I don't think MM is that far behind, if a MM player has years of experience with the spec (like Fullmetal89 and me), we can still do decent with it.