The modding side would have to as adaptable as Counter-Strike:GO(or any CS version tbh) to be hassle free. The ease of being able to join Zombie Mod, KZ, Surf, Community Deathmatch, etc. through the server browser and have everything work is what makes mods work in that game.
Still, I have to agree with Rhade on this. Maybe have thoughts on this later.
#NoBattleNoBKS