I would agree with some of the sentiment here. EtCR is not meant to be a continuation of White Wolf's work. Strictly speaking, it's not even meant to be a continuation of 2nd ed. work - it's set chronologically way back in I6 and it is beholden to no campaign setting.
That said, my own personal feeling is that the adventure would best be served by incorporation into a preexisting Ravenloft campaign. I might question the decision to split it from the Ravenloft background, but that was a decision for the authors to make and the end result is a good generic D&D adventure. I'm thinking of keeping the 3.5 converstion of the castle itself for an upcoming runthrough.
Even if you hate the encounters as they fit into a Strahd adventure, the format (I find) is well done and modular to the point that you can pick and drop them into other adventures. On their own, they are well suited for other locales in Ravenloft's extended setting.
All that having been said, I wonder at the decision to have one version of Strahd on the cover (closer to the 2nd ed., except he looks even more shrivelled and decrepit) and another version on the inside (which strikes me as strongly resembling Brad Pitt as the vampire Louis from
Interview). For first-time players it might well be confusing, especially where they might have seen Clyde Caldwell's earlier famous paintings of Strahd. Plus, I hate Brad Pitt
Bottom line is this is a good generic D&D adventure. I wish they'd do more Ravenloft stuff, but can't force them to. And even if they refuse to do more Ravenloft stuff, adventures like these are full of material ripe for the wholesale pillaging for my own Ravenloft adventures.