I have a suggestion. I know a lot of people want previously unlocked skill available on all PvE chars. But that would be kinda imba. So why not make it so that, while on the battle isles on a PvE char, you can use any unlocked skills. Once you go back to Tyria or Cantha, they will be removed from your skillbar.
Just a (very good IMHO) suggestion
_Zexion