I consider replacingProcgen Mansion with Dwellings as a generator for "exploring" buildings (inMFCG andVG). But not until this one becomes more polished.
Yeah, back doors are on my list.
Currently the generator is trying to place as many bedrooms as there are floors. I don't think you need more than that, so I guess the problem is that often you get much fewer than that, am I right? In such cases you may try rerolling rooms by pressingCtrl+Enter.
Inns are relatively easy. Temples are harder because usually they are expected to be symmetrical in plan and the current algorithm is not suitable for that. I'll think about it.