One of the things I've wanted for a while, is the ability to create exterior homes, as in having a farm house where you walk straight in, no loading screen. The problems is that the farmhouses all have a fake door built-in, and even then the interior sets might not match the exterior.
I imagine it might take a bit of work, but I'd really like to have some farmhouses with built-in interiors, so that you don't need a loading screen to go through the front door.

Any FPS issues could probably be dealt with through occlusion, so it should be pretty feasible once we get the models for it.
I just really want this. XD