2 Suggestions
1. Dungeon Levels
To get to the next level of a dungeon you should have to actually get to the next level via jumping puzzle instead of a portal or something easy.
2. Legendary
Legendary Weapons should give its own skills bars tied to the weapons themselves and F Keys acting as different races skills for the legendary weapons usable by you for having it Example: F1 5 Asuran Skills F2 5 Charr Skills F3 etc… Also maybe lets say if your a Asuran and your under the Asuran race Fkey you get a little extra bonus for it.