User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-68.110.212.69-20130306010655/@comment-6951438-20130306212711

No need to worry man the only thing that will increase the enemies difficulty is making the game difficulty higher. The only purpose of legendary skills is to get even more perk upgrades than 81. Enemies will still have the same level cap.