Quake had the luxury of hit animations and pain sound effects, you might want to add some as this is a big oversight in the hit registry and overall "oomph" of the game.
Another issue was particles inconsistency, particularly the blood being overly realistic while the particles shown when striking metal is exactly the same as Quake, it is rather an inconsistency that is noticeable at first sight.
Map design was really nice, but you should have some teleporting enemies sometimes, just to ambush players and not have them relying overly on corner-hugging.
Otherwise, very good game, I'm looking forward to the final release. This is probably the most faithful Quake clone I've seen as of late, the only problem being that it's a little too similar to Quake at times, maybe play a little more with the "blood planet" theme you got going on because that's very interesting! I'll be checking out the final product.