Yeah, no comparison is perfect, but the idea is there. Ro's issues have always seem to be motivation, and many have floated the idea he just doesn't like football very much (and before anyone starts, this isn't a Ro thread so let's not go there). Reading what I have so far on Michael though from Seahawk fans and reporters, he seems to have similar motivation issues with practice. And in his defense, it can't be fun to wake up everyday and realize you are sitting behind Marshawn friggin Lynch, you are not going to get many carries unless God himself strikes down Beast Mode, so why am I working so hard?
I agree with you about the on the field IQ, but I also don't think it is quite as necessary for a RB than a MLB. I think its more developing muscle memory and instinct through repetition for a RB, and it doesn't seem like the motivation has been there with him to do it. Hopefully this change of scenery is exactly what he needs.
But then again dumb players are dumb players. Only so much you can do, and I am sure a very good set of coaches did their best up in Seattle. But there is no question from anyone that Michael has elite physical talent. As I said, maybe being dumped for a 7th and put into an environment where he has every motivation to succeed works.