You say he hasn't been given the oppurtunities the Miz has. Ok, granted, but I say, he hasn't done SHIT with the oppurtunities he HAS been given.
I firmly believe that if Morrison was given the role Miz got and was allowed to be a natural heel, he'd be in the main event now. For being given a generic face role, Morrison has done great with it by doing the only thing he really can - put on great matches. Put Miz in that position where he doesn't get the opportunity to have lengthy mic segments and out of ring screen time, and he bombs completely. He is average at best in the ring, and whereas Morrison has had no other choice to get over with in ring work (which he has done a decent job on) given the same limited options, Miz would be in comedy segments with Kahli and Hornswoggle by now.