Pffft. Let's just call training what it is: Grinding.
Countless real life hours avoiding PK because you don't want to get smeared by that uber decked been at 50 for nine months nasty Nexian and has mastered most of his skills and has a rank advantage.
You don't rank because you don't want to fight him. You try to find a comfortable niche to sit at and "grind". They set up triggers and read or do something else, coming back to the screen every so often. You try not to miss tells. You COULD turn off experience gain and help others rank, but lets face it, it's easier to one-hit those little low level mobs.
Training, from my previous experience with FL, is tedious and slows everything else about the game down, separates the "good PKer" from the "bad PKer". I say this because the really cool skills/spells come at their best in PVP.
Upping it in PK? Interesting, but, I'd hardly say useful. You'd be condead before the perks showed up in more than a few skills. Goods would abuse it. Like Resurrection, which is unfortunately a nearly useless spell now. Healers are only useful to a group now as a semi-PK protectorant via the fly spell and for large group trips for mass healing. With less and less newer players, the healer class will probably fade away eventually since everyone pretty much knows all the equipment. But I'm side tracking.
Speed up training, somehow, FL. I can only see good things coming from it.