This is probably the best add-on I've ever found for BGE.
I have a few questions:
1.are you planning on making parts separable so one can use occluders in BGE so only rooms that are visible will be rendered?
2.do you plan on adding features that are similar to the Hammer Editor?
3.will you add some instances such as PC controller, doors, skybox setup and activators(similar to what you showed off in your videos)?
Last one I promise, is there a more up to date version that maybe is still being tested? I would even be willing to pay for it.
keep up the amazing work.