I'm curious as to how this will actually be executed. IMO, squad, class, and team-based games don't work very well with the very basic arcade shooting mechanics of games like Quake and Wolfenstein, which is why I didn't care much for the original Enemy Territory. Also, while I am a fan of the Quake series, I wasn't much of a fan of Quake 4, so if Quake Wars is too heavily based on Quake 4, I may not like it. At the same time, without being based heavily on Quake stuff, I don't see what substance will be too it since it's pretty doubtfull that it will be heavily based in realistic squad combat. We'll see what happens.
At the very least, atleast it's conceptually more adventurous than Quake 4, even if it's derivative of the Battlefield games. Quake 4 may have stuck to Quake's roots rather than following modern gaming trends, but it didn't expand on or innovate Quake's gameplay in any way. The single player is basically Quake 2 with more cutscenes, NPC's, and higher poly counts. The multiplayer is Quake 3 with far fewer maps, no bots, higher system requirements, and no real community support.