I guess the first Hotel Transylvania earned just enough to warrant a sequel, but the plotline really didn't. I remember enjoying the first film, even finding it funny, but rapidly realised during the opening sequence of part two that almost nothing else had stuck with me. There are monsters, they run a hotel. That much I remembered. The whole love story between Dracula's daughter and a walking surfer stereotype I had completely forgotten.
Honestly, I think Hotel Transylvania 2 will fit exactly the same niche. Memorable is not a word I would use to describe this film, but nor are rubbish, awful, boring or dull. It made me laugh a couple of times, made me smile a few more and kept me entertained throughout. I feel like they managed to have less fun poking at movie-monster tropes, but then (as I've mentioned) I don't really remember how much of this happened in the first movie. Is there room for improvement: absolutely. Does it really matter to the end film: not hugely.
Which about sums up my experience as a whole. The plot, humour, script, characters, pacing and animation are all perfectly acceptable. Nothing every truly stands out, but nothing ever makes me want to sigh or change channel. The result is a perfectly entertaining kids film that is worth a watch if you have nothing else better to see or just need a cerebral break. I wouldn't cry if you never get the chance to sit down with Hotel Transylvania 2, but it isn't the worst use of your time.