This system has some major problems.
look at the top 5 of the pp-ranking:
White Wolf- understandable
Cookiezi - ok aswell
SilviA- that's about right
Rucker- this is also right
Sette- Who the fuck even is he?
I mean... yeah, Sette isn't bad, but there are many players that are much better than him. He is just one of many random japanese pros. If you look down the ranks you will see many of these odd placings (one of my favourites is Hatsune Miku as #30 with guys like KRZY o Tom94 behind him). And beyond maybe rank 1000 the system basically says nothing or atleast not more than the old one. I for example can beat many people that are ranked way higher than me (up to rank 4000? no problem for me!), but I also got my ass whooped by some random 13-25kers (they were asians though

)
So the conclusion that this system really has some major problems is not that unrealistic. If you now take into account that some maps give ridiculously high amount of pp (He's a Pirate for example, or Angel with a Shotgun on easy, I got for a no mod SS on that map 1 pp, considering some Hards with DT didn't give anything to me that's pretty high) and that most of the ranks that mediocre players achieve don't even count towards the pp ( fcs on easier insanes for example are out of the rankingspectrum) then it is really fucked up.
to fix the problems with differ the mediocre players atleast halfway correct, all ranks should be counted. and to fix those ridiculous "I fc things that are hard, got good ranks, no pp for it, played one easy map, got tons of pp" issue, we need to know the actual pp formula
tl;dr: lunatic conspiracy theories all the way \o/