The BaseMaxPowerPoolByPowerLevel modifies how many ability uses martial classes have per encounter, for example how much guile a rogue class has at his disposal. The ability points per level is probably in Unity-packaged data which means it is not in any of the text-format data files and can't be modded easily/at all at the moment. For v1.0.3 the developers intend to increase the amount of available moddable data.