Now, I don't want to sound to much
, but instead of complaining that people don't respond too well on adventures one has spent time and energy preparing for it, I think the question should be: "How enhance our setting for players that don't like it?"
Ok peoples of the Ravenloft court, Daisy's got a pretty good idea here

. I say we all join in.
Higher Tech Levels: One way I enhance Ravenloft is by heightening the technology level. A big beef that players can have with RL is the inability to 'make their characters better' by weighing themselves down with obscene amounts of magical items. Frustration often seeps in, and they can at times begin to feel like its pointless to even try to have a cool character.
Players don't miss the magic weapons (at least not as much) when they have excess to things like Nitroglycerine, Shot guns, scatter rifles, dynamite, magnums, the works. My players often try to find creative ways to enhance their weapons, building sniper-rifle that can be dismantled into an instrument case. They custom craft magnum pistols that enhance the amount of damage their bullets do. They construct bullets with alchemists fire inside of them, adding a little explosion with every shot.
It requires some work, some broken rules, some creativity, and some knowledge on gunworks (in some cases, turning a blind eye to the physics of everything), but I've had some really positive results.
Limiting Character Death: Any campaign that has regular character deaths is going to either ruin the game for the players, or make everything a farce. Players are there to make a cool character, and so when you kill it part of that spark that makes them want to role play a character disappears. Again, it's a matter of making sure players don't feel like its 'pointless'. This is not to say that PCs should never die. But no player is going to want to come back if they died simply because of one crappy failed save. If I have a climactic PC death planned, I will take the player aside two weeks or so before the death and discuss it with him. This makes for a much more dramatic scene (something that is key when trying to maintain atmosphere), as well as overall happier players.