Anyway.
Have skills when you buy them from Skills NPC only cost skill points. And then depending on the quality of a skill, the amount of skill points required to buy that will increase too.
Or you could just have the skill points increase like the money 'did'(

Increases by one per 2 skills or something like that.
Ex: Meteor Shower. Pretty good skill. 4 skp. (5-7 max per skill if we went this way)
Anet could adjust this accordingly.

Pros: A use for skill points. No stacked points.
Quests that offer skill points will be loved and charished.
Skill points from exp will be of use now.
Cons: Maybe a slight feel of the need to grind.
Comments, and signed. Please.