consoles can handle mods what do you think DLCs are?
DLC′s are professionally designed add ons or changes to a game made by a professional and organized team of developers, usually the same team that made the game
Mods are add ons made by a bunch of people all over the world with varying level of skill not organized in any way shape or form and had nothing to do with the original development of the game
if you can′t see the obvious compatibility issues that would arise
I dno what else to tell you
there could be some kind of user generated content but it would have to be heavily supervised and controlled by bethesda and or Xbox PSN to ensure quality,content and compatibility
think the mod makers would also have to step these requirements and perhaps join together to meet them
(more similar to how there′s indie games on Xbox live and PSN than to the PC modding community)