[One Winged Angel]

Even for scores in good ranges closer to AAA, the skill rating algorithm is inaccurate.

I appreciate the amount of thought you put into this, and I'm not claiming the tier point setup is currently perfect (though a lot of thought went into establishing which songs would award X points).

Numerous issues arise though, the most prominent one being that the skill rating algorithm doesn't accurately reflect AAA equivalency. Take two songs, one rated 94 and the other a point above at 95. Most D7 players would probably agree that a BF on the 95 is equally as impressive as a AAA on the 94 (and perhaps maybe even less impressive, as a 1g difference when trying to improve to AAA is astronomically more difficult to shave off than going from 10g to 9g, or even 3g to 2g). The difference in an additional difficulty point is vastly overestimated in the algorithm. A score of 2-0-0-2 on the 95, for example, receives an AAA equivalency value of 94.XX, meaning the algorithm reads this score as more impressive than any 94 AAA. I know the playerbase wouldn't agree with that comparison. Furthermore, the skill rating formula decreases AAA value linearly (I believe) for scores in these good ranges, which shouldn't be the case, and the stat for that 95 score becomes increasingly overvalued as more goods accumulate (at least in comparison to files in that general difficulty range, comparing a 95 to something in the 50 difficulty range is an entirely different beast).

I also would not want to set the tier max for any one song to a score value lower than a BF. Maxing a song's tier points implies mastery or near mastery of that song, and setting 2g or lower as the upper bound doesn't imply that.

Other problems exist on the lower end as well as Autotelic pointed out but I'm far too lazy to get into those intricacies and why imo those scores do not display an accurate reflection of AAA equivalency.

I believe changes are in the works for another more accurate iteration of the skill rating formula but I'll let an admin/dev comment on that.