Joe Henning is super talented. I think I'm one of few who actually liked that promo Steve pointed out there. I thought it was really good lol!
Anyway, Henning is very solid in the ring, and his mic work is great IMO. As TDA said, he's got even better recently, and his stuff with Tyson Kidd was very good and entertaining.
As for his finisher, I like it. He makes that snap swinging neckbraker look like it really hurts. He does use the Henning Plex as a signature move, and I think that's enough. While it's good for him to use certain aspects of his Father, you also want him to be his own guy.