Take Cover is far from finished. There is a reason that the Assault Rifle does the same damage as the RPG.
Personally, I think if you want to make a multiplayer game, it has to have some kind of gimmick that changes gameplay to make it stand out from the rest of the million+ hardcore military shooters. For Urban Terror its that crazy powerslide thing. I dunno, you could have really good maps, or lots and lots and lots of weapons, or some kind of way to incorporate vehicles (Like COD and killstreaks), or you could do something crazy like have an FPS/RTS like Tremulous but with this kind of FPS? I dunno.
And before you ask, TakeCover is both not finished and also just designed for friends and I to play at LAN parties and such.