If there was complaining about the blood, gore and visceral; House of Horrors wouldn't of made it long in it's operation life-span.
I think the issue of TWDA lies more into that, it drags on at certain aspects. If it was given a bit more space to accommodate for extra show scenes from the TV series; I think it may of not been a problem. But because of that, many people find it to be a lackluster experience that while yes, Immerses you into the set work and visual effects; doesn't drive home what made House of Horrors repeatable and great to begin with, variety.
TWDA is an attraction that can be great, as long as they mix elements of what made House of Horrors great in the allowing of Actors to work around with the set they have, but with TWD and incorporating more of what made the TV show a hit (and I mean that in the terms of having more horror aspects of the show).