KOTOR 2 is a deep game. It has deep characters and a deep story. My only disappointment about it, aside being un-finished of course, is the lack of Star Wars feeling. It was too dark for a Star Wars game imo. That's why I prefer the first one over the second.
I think it was too early for a second NWN game. First one had and still has lots of potential. They(Atari), tried to fix something that already works. I think, the last game which needs prettier visuals but lesser content is the NWN. NWN was the one of the few succesful games Atari had and they tried to use this success to milk the gamers.
And SEGA is doing well and they are far from dying. In fact, it's the opposite. They have agreements with great western developers like Obisidan, Petroglyph, Monolith, Gearbox, The Creative Assembly, Sports Interactive. And the latest games like Armored Core 4, Virtua Fighter 5 are very succesful in eastern markets. If one publisher is dying, it's Atari not SEGA.