Please, please, please, please, please - change the requirement to 'purchase' the "Core Enhancement 1" in order to unlock the respective enhancement "tree". At the very least for the racial "trees". Perhaps this is the mechanism that is planned to use to "lock-in" the (up to 6) class enhancement "trees"? Even so, there should at least be an exception for the racial "trees". Either that or make the racial 'core enhacnement 1' to be 0AP, as it was in 'alpha'. The core enhancements (even the very first one) should be optional - not mandatory. If the first one were to cost 0 AP, then at least that allows unlocking a "tree" without having to "waste" a limited supply of AP. Especially if it is to be "wasted" on something that is not even wanted (the worst kind of wasting).
Also - please, please, please, please, please do not have "AP spent in tree" requirements for the racial "trees" (I would actually prefer not to see it at all, but guessing that ship has already sailed). Allow all AP spent in class "trees" to count for AP spent in racial "tree".
Otherwise, as things currently are, I am disinclined to ever - EVER - use the human racial "tree" (and seeing as how my toons are nearly exclusively human, that would be "bad"), as the costs to get even the nice, 2nd tier "fighting style" enhancement is just too cost prohibitive.