CryTek is far more ambitious than id has been save for the first doom and quake, with their one line of AI code and tiny, shoebox-size indoor levels.
I remember the patches and hacks when GLQuakeworld was released. Those were the days id was pushing the envelope. It seems that, in recent years, other developers beat id to the punch. Hi-res textures, single-player immersion, advanced AI, portals off BSP tree, large environments, bump mapping, realtime lighting, etc.
After Quake3, id really needs Doom3 to not suck.