Would his chin be classified as "bad" from the amateurs? David Price is what I'd classify as being a "bad chin" from the amateurs!
We have to see how he handles a punch from a live body in the pros But in my opinion he has a bad chin
After he throws a right hand he does not bring it back to his chin in a straight line. His right hand goes up in the air over his head. This leaves him open for left hooks (or roundhouse lefts from southpaws). His chin is also not "questionable". It's been questioned, charged with being made of glass, found guilty, and sentenced to 20 years hard labour. He has been stopped by a fat Romanian, ffs.
You do realise that some fat people can punch? It amazes me when people complain about someone's chin when they take a punch of fat person badly. If a fighter gets hit by a fat boxer then you should be more concerned by that boxer's inability to get out of the way from that punch and not by the effect of the punch.