Seriously who came up with the idea of nerfing your character while all the enemies are still high level.
Here is the CORRECT WAY this could have been done.
Choose to go legendary after hitting 100 in a skill.
Skill starts counting up from 100 to 200. Then activate legendary again and start counting from 200 to 300. Etc, etc, etc.
Each level gives you perk points and points for mana/stamina/strength but doesn't increase the damage or reduce mana cost or anything like that of the skills.
There you go exact same effect that is currently implemented with the legendary system except without screwing over the players by nerfing their characters.
Seriously Bethesda please alter the legendary system to this method rather than implementing one of the worst ideas in the history of games.