(I wrote this in the feedback box of the general class survey, but I wanted more eyes if possible and community feedback on it)
I don't know if this idea has been posted before, but for the sake of proliferation here is my version..
I'd like put forth a suggestion. I believe that auto-granting the Core Enhancements, after the first one, by the points spent in the Tree, Class levels, and Sequential Order(Left to Right), without requiring action points for each Core Enhancement, after the first one, would provide for a better player experience.
It would work similar to Epic Destinies, in that they are auto-granted, but instead of being granted by Destiny levels, they granted by the aforementioned requirements. Of course in doing this it would free up five action points, which also gives players a little more flexibility.
Optional(That I'd really like to happen): Once you are auto-granted the Core Capstone Enhancement, for your investment into the Tree and the class, you would receive one action point to compensate for your initial point spent into the Tree. (Or you would be given back the initial point spent, I figured the first option would be easier to develop, it seems to end up the same either way.)
This would of course allow for one extra action point to be spent adding a slight bit more flexibility and, on a slightly silly note, for those that are a little OCD about even numbers to have six total action points from this change instead of five. This would also give a little more incentive for getting a capstone and staying a pure class.
Thank you for reading and your time, I hope this helps.