Ability to read fast enough for a certain AR is a tricky skill to reward properly because for the most part, either you have it or you don't. Some maps are harder to read than others, but that's usually not AR-specific for a map and can't be measured anyway with the current difficulty algorithm. When you give a % bonus to aim for playing a certain AR, you're saying that someone who can play that AR (and maybe even only that AR) is a certain percent better than someone who could do the exact same thing at some lower AR, which is kinda weird. Maybe instead of returning it to its former value it would make more sense to give a low % bonus to aim pp for scores earned on higher approach rates and some flat bonus to the score's pp on top of that that depends only on the approach rate and what fraction of FC you achieved? Would make high AR more valuable for lower-ranked players and less valuable for higher-ranked players than it was previously, which I think is probably fair. In the extreme case (not suggesting this would be a good idea (though I do think there's SOME merit to it), just throwing it out there), changing the high AR bonus to a flat bonus that depends only on approach rate would mean giving a flat bonus to total pp for someone whose scores are all FCs on some specific high AR (more specifically, 20 times the bonus you get for getting a FC on one map at that AR).
Ideally there will eventually be a way to measure reading difficulty that handles both high and low AR in some map-dependent way, but until then, it's hard to say just how much of a bonus high AR should give.
Ideally there will eventually be a way to measure reading difficulty that handles both high and low AR in some map-dependent way, but until then, it's hard to say just how much of a bonus high AR should give.