Honestly, I think at this point the big issue isn't so much with the concepts themselves or synergy with Orlando, I think post-Legends Collide the monsters houses have sorta just become a big budget cut unto themselves. Idk if it has to do with them just garnering less interest on surveys or attendance from general guests, but it was made pretty clear that Unmasked was a significant victim of budget cuts that led to a lot of set loss from the treatment to the final house, and given how many flaws Unmasked had that Eternal Bloodlines shares, I kinda have to assume it's the same situation.
I feel like it can't be a coincidence that we hear about a monsters house losing a lot of material, and then suddenly every monsters house takes place in a crypt or other smaller scale sets that are easier on the budget, and each of those scenes are broken up with lengthy transitions for pretty simple story beats. Bride of Frankenstein Lives did virtually the same thing, but it felt significantly more cohesive despite being off the heels of a pandemic lockdown, so I really have to think these days it's a matter of just not having enough money allocated.