The first part goes without saying. Its not something anyone would argue.
It seems we are excited about the move far in advance of knowing whether or not he is a significant upgrade outside of snapping the ball. His college tape (albeit this is tape form three years ago and he is pretty likely a stronger and more athletic player now), shows clearly why he went in round six. He is often over powered, far too often on the ground, he tends to lean, whenever hands reach him first, he is violently ripped often to the ground.
He over steps and gets flat footed and is not athletic on the second level. His pre season tape at center with the ravens backs this up. This is not to say that he won't/hasnt improved. He may have. I'm just not as excited as a lot of fans seem to be.