- The amount of ammo for lower ammunition weapons is capped at 25
- Consistent spread when firing the shotgun
- Strafe jump up stairs
- More balanced weapon damage (80 dmg rail, 10% increase in rocket speed, mg dmg to 4 and maybe even lg dmg to 6)
- 250 fps
- Lag compensation
- Steam integration
- All the maps in one client, you don't need to install 27 mods and map packs before being able to play
- Friend list
- Having players
- Uninstallation

Link to "Things Q3 does better than QL": http://esreality.com/post/2944234/n-a/#pid2944234