Great mod, loads of fun. It modernizes Doom, but in a good way. Two things I would like to request.
1. sounds for waterfalls/liquid falls. It is nice that there are sounds for torches now, but it seems a bit strange when near a waterfall and there is no sound. Surely surfaces with flowing textures could be tagged to play a rushing sound.
2. Cyberdemon should be a bit tougher, at least against the BFG. He's supposed to be a bad-ass and instill fear in the player, so it feels kind of too easy to paste him with 2-3 BFG blasts.