Well er....Nerfix's replies werent very creative, I must admit that.
In fact...he had no points, that is true as well.
As I said, the best would be to allow the players to make mods,
if they want, no players are forced to play with any mods.
Just think. A LotR mod for example, would be very interesting and useful, since lot of players are huge LotR fans.
Balance? If you spend enough time to balance your mod, it can be perfect.
To me this isnt a question. Players should be allowed to make their little world. Why to put in limits? If Illwinter will be able to release the tools, databases etc. than why not?
Mods are keeping the games and communities alive. Trust me in that.