I'm DMing a Ravenloft campaign with my group and we're currently 11 sessions into it. Started out in Lamordia and the past seven sessions the party has been in a homebrew domain where the Headless Horseman runs rampant.
Our campaign is definitely sticking to the Core geography and ignoring the soulless shells bit. We still have to talk over what we as a group want to incorporate mechanically into our campaign, but it's a safe bet that Dark Gifts, Mist Talismans, and the new take on Vistani will be included. The domains chapter is a real gem, as it's given me lots of new ideas to incorporate into our game!