Yes, that's already on our roadmap. For starters, we implemented a new option, "Force Rooms Transversal"; while this is not a "new algorithm", it allows for more control over how rooms and corridors are generated.

Ah, I see. Sorry but at this stage the closest thing is the picture we posted earlier. We'll take your request as a suggestion for next versions, though.

Yes, Daedalus does have 2D/3D directional walls and floors. You can achieve something like this:

Unfortunately, you can't generate NavMesh at runtime with Unity, but you can generate it beforehand and use that trick shown in one of the Daedalus videos. There are other options, though: you can use any other package out there that offers runtime pathfinding data generation.