On a related side note, have you considered making skill points be the reward for ascension? you get one permanent skill point each time you ascend, thereby increasing the number of times you need to ascend in order to max out all the skills. Plus you wouldn't have to worry about adding more skill points for each ascension a character goes through. And if you wanted to make it even tougher, you could say that points could only be spent on skills for whatever class you were currently.
Yes and no. I've definitely considered it, and expect ascension to give a benefit in that area, but not quite as described. But as I said, this is about "should I spoil it for you?" and not about the nitty-gritty of how it'll work in detail. That's potentially a huge discussion, and I don't want to distract from what's an important answer for me to have as I make my plans.