That was definitely a bad design choice for WDW, and then Tokyo. Tokyo does a slightly better job with it because they have this winding queue through gardens in front of the house where you get to look at it and register the mansion as part of the show.
I fully understand that this design was forced on them by high water tables in both locations, but still. It's bad.
At WDW, you just go through a covered walkway that obscures nearly everything and scuttle in the servants entrance on the side. Couple that with the fact that too often the lazy operating standards of WDW allows them to not even run the expanding room scene and instead just shuffle the queue through that room and on into the loading belt is...
disastrous.
I mean, my God, they didn't even extend the stretch room all the way up to reveal the full sight gags on each portrait!
I'll be really interested to see how they operate Disneyland's Haunted Mansion with the Covid requirements. They have to use the elevators and operate the attraction as it's 1960's designers intended, there's no other choice. A lazy Dockers clad manager can't just say
"screw it" and open the ride without the stretching rooms in Anaheim like they can in Orlando.