Another observation, on some easy/normal map:
getting SS with HR gave around 12pp
then I add HD, get a higher score with A than my previous score with SS,
and instead of 12pp I now have 6, like, why?? shouldn't there be some kind of better correlation between score and pp systems?
On low maps this doesn't really matter, but if for example someone spent a lot of time getting SS on, say, hard/insane map, then tried to complete it with mods and get his pp score for it cut in half because of it... that would really suck