Reasons why this division won't turn out for the best.
1. Unless the server is modded to have up to 30 slots, this division won't even last a week.
2. Most people who are on killing floor are pubbing with their friends just looking for a quick match, not to stay.
3. There is only one type of game play which is to survive the zombie invasion. On the popular divisions such as CS:S, CS:GO , Garry's mod, and Team Fortress 2, there are multiple types of game modes. There's jailbreak, surf, death run, TTT (garry's mod only) Gun game (Counter-Strike exclusive), and many more on top of the original game's mode(s).