Suggestions:
1. Custom grenades (frostnades, napalmnades, electricnades).
2. More combos:
- Leviatation combo (when player holds space the gravity will be set to a small value, when released will reset the normal gravity) and a bigger speed
- Semi-Recoil combo (smaller recoil)
- Fantom combo (allows walk through walls)
- Bunny combo (bunnyhop)
3. Automated machine guns (with big price)
4. Autotaunts
Ex: when a player sees a flag carier he automatically says I HAVE FOUND THE FLAGCARRIER
Threaded Mode