This is opinion, obviously...
The Authors fell in love with the novelty of including every. single. horror. sub-genre. The original ravenloft was all about high gothic horror, Universal-studios style. In this one, you encounter:
(1) A zombie plague
(2) A Serial Killer right out of some unwritten Thomas Harris novel
(3) Some extra-planar relatives of might Cthulhu
(4) A Frankenstein-esque creation (which ties with #1)
(5) Witches trying to summon a Demon
(6) A Bunch of feral werewolves right out of WoD.
The last three weren't too bad, but the first three were jarring, quite frankly. What the hell is a far realms breach doing in the middle of Castle Ravenloft?
I'd ratchet down some of the non-Gothic elements by taking out some of these subplots (which ties in nicely with one of the above suggestions).