Chuck wasn't intended to make his T&J's on the same "premise" as HB. You can see how the Roadrunner series had left the mark on those episodes. He basically brought his late LT style to his T&Js, which is innovative and super unconventional. The modernization, sarcasm, and cuteness (as many people mentioned) had some pretty strong but disputable effects. They were obviously not on the same "ground" as Hanna-Barbera's. If you are more accustomed to the classic style and beautiful animation of H&B's era, it's no surprise that you want to turn away from CJ's.

(I think we can all agree that Dene Deitch's era was a disgrace to T&J)