Fighter class needs the bleeding damage like had once on TW! Especially to fight against nameks with 20k of LP...
About new skills, I think is impossible to create new ones, at least right now, so it's a great idea to "borrow" some skills from one class to another, for example:
Big bang attack and final flash(Fighter quests), add those on Turtles and Cranes, and physical attacks they have add on fighters and swords, it would be very cool have more skills to test!