Another concern, which isn't directly related to pp itself but regards the star rating, is that with certain patterns, SR tends to horribly skyrocket. This has been probably brought up in the converts discussion with
1/8 doubles (which is common since you have 1/8 sliders now, ggnore), but this does not stop here.
In Kantan difficulty, if you don't keep a constant rhythm with 1/1 notes, the SR skyrockets a lot. That is, take a map which is 1/1 only, and a map which is objectively easier but has 3/2 notes:
The difference is small on that example, but on larger note amounts, this can increase the rating greatly.
Futsuu difficulty: Double notes is a factor of massive star rating increase, and that carries over to every possible snapping (with even more dramatic increase as the snapping is tinier, to the point it reaches ridiculous ratings, thinking about the converts we've talked about earlier in this thread) - Proof:
When spacings between notes are regular (2/1, 1/1, 1/2 only)
When 3/2 spacings and 1/2 doubles happen:
Another concern is the 1/6 + 1/4 streams, which end up giving ridiculous ratings:
Comparing to maps that are purely 1/4, this has to be a huge problem:
Another problem is streams. Depending on how you construct a stream, the map might be overrated a bit or ridiculously underrated.
https://osu.ppy.sh/s/28609 Kyoai - 5.06 stars for fairly simple streams
https://www.dropbox.com/s/dwcrd3gbk3hhl ... 4.osz?dl=0 Starstream 7.14 - 5.04 stars for painful streams.
I've also noticed that sometimes, long streams containing kkkdk somehow get rated lower than streams having only {{kk}*{dd}*}*.