Hi, BTSX playtester and Essel's very own partner-in-crime here; I must confess I was the mastermind behind this little joke.
Well, um, that was the joke. I'm sorry your feelings got hurt when we mocked your gravely serious complaint about the mapset, but to say that's the "underlying reality of this whole project" is to again completely disregard that a) you haven't seen the whole project, and b) to make it sound like you haven't even actually played or seen what has already been released in the first place (see Fisk's post).
But consider, O clever one, those 4 fake screens you put up for April Fool's are, in a real sense, not fake at all. Because truth is that those 4 screens capture perfectly the underlying reality of this whole project. A largely undifferentiated mass of levels that pass by in a homogenous blur from one to the next. A lot like those 4 screens do. And to think, you were trying to be funny.
And to think, you were trying to be serious.
This kind of baffles me most of all... I realize you're speaking speculatively and sort of off the cuff with that, but replace all the spites? You mean the enemies too, or just the trees and such? If it's the enemies, then why just change what they look like, one would want to recode their behavior and attacks too, to make them new enemies. Basically that would change the whole gameplay and require learning new balancing techniques and... you do realize this is supposed to be Doom, not something completely different?
Maybe if all sprites were made from scratch as well specifically to match the visual style of btsx, it would look much better to me, but as of now the whole product is a bit of a mishmash in my opinion. The last screenshot looks so cool at first glance but then I see these simplistic Doom sprites and limited architecture/detail (I mean if you compare it to more modern games with 3D engines that allow much more stuff like slopes, 3d floors etc, I'm not saying that it is bad in Doom's context) and the whole thing collapses.
As for replacing the more general sprites, I suppose that could have been done but doesn't seem very necessary... I agree that they honestly look more at home here than in the original texture sets, heretical that may be to say.