Blender Level Design Plugin Usefulness?

EDIT: This is now released: Cubecus Level Editor [v0.1.7]

I’m working on a plugin to speed up level design in Blender. I come from a Hammer background and really dislike how long it takes to throw together some basic stuff.

The plugin isn’t really all that much but here’s an example. It would eventually have more features like texture applications (along with specific textures to eventually delete certain faces of a mesh) as well as some sort of collision mesh generator (specifically targetting Unity3D)

I’m just curious on if anyone knows any alternatives before I put more effort in? I’ve done a bit of research but couldn’t find anything.

Is anyone interested in having tools like this?