There is a reason nearly every single successful MMORPG does NOT use a 'pay for skills' system. Because its idiotic and counter-intuitive. Grinding in planeshift is pointless enough as it is without adding yet another layer of hardship to it. It creates a plateau at of all the stupid places, the fresh off the tutorial noobs. You need money to train skills. In order to get money, you need a skill. Catch 22 of awfulness. The successful MMORPG's I'm referring to are the likes of Runescape, World of Warcraft, I suppose you could say Diablo. The only successful pay-for-skilling MMO I can think of off the top of my head is EVE Online, which has long been referred to as 'accounting in space'.
But here the extra mile of ridiculous is taken, a THIRD layer of completely unnecessary hardship, the PP system. I've played quite a few MMO type games, and while a few (immensely unsuccessful, the big name ones use learn by doing for a reason. IT WORKS. Just because your system is unique, doesn't mean it's any good.) used the pay for skills system, they kept it at that and hell even used it as a basis for a real money shop, which players might hate but is a solid business strategy.
Having three layers of mind wrenching toil to get 1 measly level is just wrong. Either strip away the proven terrible systems and go full learn by doing, or stick with either the PP or monetary systems alone. It'l still be a poison in the well and continue to drive off players, but will probably do so at a much slower rate.
At least the monetary system makes a modicum of sense, you're paying for a trainer to teach you things. While for simpler skills that don't actually need any sort of formal trainer to pick up (Mining, Body Dev, Strength, ect) it's a little silly, it still has that basis in reality you can argue for. PP doesn't make any goddamn sense at all. You need to kill (lets face it, hunting is the only reliable way to get PP. See above plateau) things to acquire a metaphysical concept and somehow channel that mystical force into a 2nd layer of purchase required for training? What? I'm sorry but what? Can someone (preferably someone actually playing the game atm.) explain that to me?
/rant. TL;DR nova's right but we all know it will never be changed because the idea has somehow sprung up that being different is a substitute for actually functioning.