You're right that being inside the dolls house is quite creative, but i think it potential could limit the creativity a bit as well as every scene has to be themed to a house whereas the original HH had so much variety in its scenes, from a possessed room, a gothic hallway with giant hands crashing through windows, a endless void of screaming heads, a swamp full of man-eating creatures and the environment trying to kill you. No way scenes like that would work in a dolls house, which personally for me really limits to what they can do on the creative and idea side of things. I don't want just spiders and toys in there, I want all types of paranormal beings that stick out from one another.
I simply want the ride to have a lot of variety and not just a single theme with every scene based in a simple victorian house with creepy toys placed throughout it. Yes, the Grand Hall is my favourite scene and would definitely fit in a dolls house, but it would get pretty boring with every scene set in a typical old house like most Ghost Trains.