Yeah, it's just in case I change my mind on the idea.
Unfortunately that does mean it's wasted memory effectively, but it shouldn't be horrendously large. I'd rather say "yeah, we can go back on this decision because you've still got those settings" than have to say "sorry, no dice".
If it's a major problem, we can just tell users to delete the tables (running this ingame would do it):
Lua Code:
/script PowaSet = nil; PowaGlobalSet = nil;