They've only revealed 3 things..
Expanding the Walking Dead doesn't do a thing? Have you looked at the response on AMC's Facebook page? Incredibly positive. The same goes for HHN's Facebook page, which is mostly positive with a few scattered complaints here and there. The attendance numbers will speak for themselves. Again, sorry you don't like the theme, but you're very wrong.
IP's have been in the event since it began, so technically it is also in the "roots". Guess what? IP's and movies are what Universal Studios has been all about since the park opened.. "Ride the Movies" anyone? I don't really know what point you're trying to make by saying it goes against what Horror Nights "was".. If you're talking the scare tactics they use and the conga lines, then sorry, that is going to have to happen at the nation's largest Halloween event at the 16th most visited park worldwide in 2012 (IOA was #10, both were in the top 7 in the country). The park has and will continue to grow and learn to deal with higher crowds than ever before, and the event will grow and learn to grow as well. Those ball pit slides and houses where you wear light up helmets are gone and won't ever be coming back, so forget about the past.
They still do cater to the fans. Who do you think last year's Horror Unearthed was for? The fans, who complained to high heavens about there being no interactive games. They still offer things like the Unmasking tour as well. They could EASILY say "screw the fans, we know they'll come anyway" but they don't.
Selling out is always a good thing. I want to see the event and the parks do well. Would you rather the event bombed this year? That would not be good for anybody. Whether people like it or not, this is a business, it will always be a business first, and thats the way it should be.