I have taken pains to somewhat migitate that (and why this has not come up before). I realised that basically we had ensured that ever spellcaster character or NPC we'd ever had had gotten Aura (+1PP/level) and Archtype (inherently x2 PP) background options, just in order to be reasonably functional.
With my latest round of revisions, to remove that need, I have modified the stat bonus table a bit, and have something more like the rounded progression in RoCoIII, I think it is. (Though not exactly, since I wanted to keep all the +5 break points in the same place for backward compatibility with my older game stats.) This has given the players a little bit more in the way of PPs as the fractions granted are now retained until multiplied out by level and/or PP multipliers.
In addition, I have implemented PP Development, which gains you 1 extra PP (not multiplied out by multipliers of level) per rank, and for good measure, granted one free rank for every two ranks of spell list acquisition you have.
(This means that older characters, who already have loads of PP, won't feel the loss of not having developed the skill, nor will the PP they get from the free ranks make them much worse.)
This gives Norath, at the heady height of level 6, a very respectable 52 PP1 (or 37 if he doesn't have his PP multiplier). (Jihad (from SUC) is one of those lists, so even with his PP multiplier, he could get through that VERY fast!) Indeed, the only reason he has a PP multiplier at all is he that spent his entire 9000 elemonit starting fund allotment on his two handed sword! (This particular party is like a Lich version of Stargate SG-1, so his other equipment is provided by the Aotrs itself. Indeed, I've basically cribbed the gear system more-or-less directly out of Stargate SG-1 D20.)
Bit of a case of splitting the difference, but I think it seems to be working; the only other character I have gotten generated so far (a fighter) has 14 PP, which will give him enough to make use of the odd spell.
1Helped along by the fact that the entire party has been granted ten ranks in four of his base lists automatically2, meaning he has a fair bit more DP to spread around to other skills; he's actually only developed about four spell lists himself.
2The party are all members of the Aotrs organisation, which teaches several necromancy spell lists as part of basic training (which they have Sufficiently Advanced Necromancy for that they are suitable for more realms than just Ess/Chan hybrid, so they would be taught the one most appropriate to their own realm affinities). Regardless of how many years that takes, because Liches.