Some more feedback in addition to everything that has been mentioned so far:
1) The most overrated (ranked) map in the entire game has to be
Kyoai with DT.
6.99 (essentially 7) stars is completely ridiculous. I got a 1 miss sightread play, and I wasn't even warmed up. This map deserves 6 stars max, probably even less than that. It is super easy for 90% of its playtime and has only 2 slightly tricky parts (which are short and repetitive) and a very basic 1/3 stream.
I feel like the straight-up
kddkddkddk /
dkkdkkdkkd difficulty assessment is too heavily skewed in favor of those specific patterns and not enough towards actually difficult, confusing streams. Something like
kddkdddkdkkdkkddk seems to be rated as easier than the basic stream pattern despite being significantly harder.
2) Low BPM is underrated. That is, low BPM with difficult patterns. I have a bunch of deathstream maps in the ~130/140 BPM range (many mapped by well known "overmappers" like Firce and Ishida) that are rated below 5 stars even though they are easily as hard as most ~5.8* maps. While pattern difficulty mostly becomes a nonfactor at super low BPMs (like 100 BPM), there is a pretty wide range of speeds where star difficulty simply does not reflect the complexity of the map to an appropriate extent at the moment. This might also be related to the limitations of stream complexity calculations mentioned before.
3) Something wonky is going on with speed scaling I guess. Take a look at
this map. Both [Last Taiko] and [Nineteenth Taiko] are rated at 9.23 stars, with 19th being listed as harder by some 1/100 of a star or something. However, the difficulties are not even comparable in practice - while a seriously dedicated top level player could absolutely practice 19th enough to FC it, I haven't seen anyone even pass Last yet despite it having a life drain difficulty of 0 (seriously)! Last Taiko is essentially a true 400 BPM map. I'm assuming this is a side effect of whatever you did to nerf 1/8 mashfest conversions, but it's not working as intended since this map has absolutely nothing in common with those types of maps. This actually has patterns (and lots of them) rather than completely monotonous dddddddddd spam. You cannot mash this. You will miss 90% of the map if you do. As long as Last Taiko is assigned the same rating as 19th, there is something seriously wrong.
4) Hidden weighting is really messed up, but I guess you already know this. Just to illustrate, some scores from the Kyoai map:
HR DT 100% = 410pp
HD DT 99.35% = 409pp
HD DT 99.86% = 421pp
The HR DT score is ridiculously difficult, even though the map itself may be overrated. Yet it can be tied and even surpassed by way easier HD plays.
On the other hand, there are also lots of maps where HD is underrated (mostly high OD maps I think).
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