Hotel Transylvania - Uno scambio mostruoso

I really liked the three Hotel Transylvania films, with the third one being my favorite, and I was really looking forward to this one, but..

Wow..

90% of the jokes are just slapstick (and a pretty mean-spirited one at that), and only seven characters get transformed into humans or monsters, even though this is supposed to be the biggest selling point of the film; just seems like a missed opportunity, really.

The whole conflict between Drac and Johnny just feels recycled too, like, haven't we already gone through this with the first and second films? This feels like an unused idea for the second movie that was wisely shelved but was now brought back for.. what exactly?