I think I'm going to do this. My current CTF project has the paths pretty much set. But Urban Terror in UE5 is still in alpha. I'm going to remake it in Ioquake3, older engine, just to playtest. More than than, replace the default grid texture with some color coded textures just to give some directions in regards to design. Indicate dirt, grass, trees, stone floor, etc.
With playtest I can at least have a better idea of it. The current blockout state is pretty much a sketch with holes everywhere and unfinished walls, unfinished roofs.
I don't think a recruiter wants to see a level which was never tested and the blockout phase is not even finished. It's half finished.