Seriously this is so far one of my favourite TC for Doom and I played demo 5 times so far, and almost everything is great: graphis,sounds, level and monsters design, gameplay...
But I think gameplay will be epic if you include better and more blood and gore system like in Brutal Doom/ Project Brutality.
Right now gore is not bad but some fights are not as epic as they could be. Great weapons roster that is in game with awesome visuals and sounds should create more carnage ;)
Anyway can't wait for full release. Good luck!