Doesn't work the system like that?
if say somebody ranked 200 in PP holds a #1 rank, and loses it to a player in top the top 50, they should lose less pp than usual.That would be the intent... if you're at a disadvantage of skill, higher skilled people will take your top ranks and push you down to the level you belong at. It's not about being fair... higher skilled players are supposed to trump weaker ones. It's also far from zero sum, the value that you got for a top rank isn't transferred to a person that steals it. They get whatever it's worth to them, you lose pp according to how much it's worth to you. So there really isn't a lot of point in using player ranking in there at all.
Say the song has heavy PP influence, so the guy gains 20 points for the #1. but then loses 7 points when the guy takes his #1.
Depending on the rank of the #1 stealer the guy shouldn't lose as much because it's given he's at a disadvantage of skill.