To be fair, while the screenshots on the first page look amazingly good, I actually echo Bloax's complaints regarding the last one that was posted - it indeed looks rather bland and nondescript, but I think the main issue here isn't the map itself, rather it's the fact that the screenshot was taken at a far too low resolution. I get that this is supposed to be a vanilla compatible project, but we're past the age of having to look at tiny images at the back of game boxes to get an idea of what a game is going to look like

I think it would be really nice if you could take a higher resolution screenshot of that same area, even with just PRBoom or something, to get a better idea of what that even is. Ultimately though, it's up to you of course, if you don't want to reveal too much.
That being said, do definitely keep up the good work! A lot of TC's have come and gone over the years but with few exceptions, most never really reached the point they hoped (assuming they ever reached any point at all). I do hope your project will carry on to the end, I am (and I assume many others are) always in the mood to try out Doom-style games. Cheers!