I think there's some more skills/spells that could be added to the list of purchasable abilities for roleplaying points.
Peek: I am not sure if this would affect PK too much, but I've often found myself wanting this skill to see if keys/items/etc are in a mob's inventory (esp if the items are level 51+ or nolocate).
Remove curse: A convenience thing, sort of like identify and locate object. Makes you a bit more self-sufficient without really affecting much of the game.
Create food/water/spring: Aborting long trips because you ran out of food/water is super annoying.
I'm not sure about remove curse. Curse is a powerful PK tool, and shouldn't be negated by a few journal entries. It's curable in-game, sure, temple healers and cabal healers are plenty. That said, they lag you a lot longer while bloodied than the spell version, which is part of the balancing aspect behind allowing every class a means to cure some maledictions.
Peek is a pretty valuable PK tool, especially combined with detect magic. Locate object is already a valuable PK spell and is available a relatively low cost.
Remove curse, meh, I could see that being added to the list but at a higher cost to the other three...more like 40 RP points.
Create food/water/spring - sure...if you want to waste practices as well as RP points on them, by all means!
Peek is incredibly valuable. While not all people will want to spend points on it, that gives the opportunity for a very noticeable edge in combat.
Remove Curse. I'm not opposed to allowing this. Especially if Thieves can still plant cursed demon talismans...I always thought that was too imbalanced of an ability.