You think about this stuff and what it means. Would Wells really be starting if it weren't for his ability to read a defense? I think we all see the deficiencies in his blocking abilities these days.
People want to bag on JL but IMO he is no where near as much of a liability in the physical part of his game as Wells. In fact, I think he is one of the better true MLBs in the game right now. True that he's not a thumper and is not as physically gifted as some but he is always around the ball, is a good blitzer, rarely misses a snap, and is pretty good in pass coverage (I know some don't agree but...). So even without his ability to call the defense, he is still a pretty damn good player.
Add in his ability to recognize offenses, direct the defense, and learn a system and I personally am damn glad we have him.