Has some physical problems for sure.
Its possible they have examined him and figured that it was just anatomy or better to leave it for his performance, but this guys leaning so far forward, he's got some of the worst lordosis I've seen from any football player. That is usually because of bad muscle imbalance somewhere. There are players who made it work like Hazard as part of their game though, however he was a gifted and special athlete regardless.
He mentioned in an interview some time ago that he is a very slow player. I think its obvious why as with such tight legs or back his stride length will be non existent. These type of players usually have really great acceleration then a bad top speed because they just hit it instantly because of small strides.