Hasten is a real hot button issue. Any change whatsoever is met with pitchforks usually. That being said its not as essential as it once was and i rarely use it myself.
As far as the fighting pool goes. Most mmos that feature skill trees force you to choose weaker abilities early on in the tree to unlock the more effective ones later. This is fairly normal and accepted as a standard. Changing this pool to inherent sets a dangerous precedent. For example nearly all support AT's take the leadership pool, should this also become inherent?
I personally use a pure human form kheldian and find him to be terribly powerful as is. Built and played properly kheldians are quite good on their own. Adding more slots to just one AT is unfair to other AT's and is a definite power creep.
Finally, welcome back. Its great to see you again. We hope you stay awhile to kil skuls.