IMO 1~50 learning style is perfect. This way everyone has the basic of every class.

I'd like to see higher tier actions being quested tho...like me being able to quest a Skull Sunder III or a Fire III. Also, to raise the uniqueness feeling, would be nice a certain NPC offering the tier up quest of a bunch of actions (i'd say like 3~5 per NPC) and you have to pick which one you want...once you pick a certain action, all other quests become locked. This wouls stimulate a strategic picking of actions.

But, of course, an option for forgetting the action so you can redo the quest would be needed too for those that just accept it mistakenly or just think what they learned isn't worth having.