Considering that this game is only at version 0.3, it is safe to assume that the look of the game will only improve. When we hit 1.0 it could very well look like another game entirely when it comes to quality :]
The server is usually populated with 100-150 players, sometimes topping 200.
Keep in mind that this game is built entirely by volunteers - we make no profit from it, and we have real jobs and real lives that come before development (usually :P), and we're not necessarily professionals. It's a learning experience, for artists especially. The game has improved drastically from the first 3D version, Atomic Blue, and it will only continue to go up.