Well, this would certainly revive lot of the old ranked maps that just have the wrong AR (like ar7 4.5star 200bpm maps etc)
Generally allowing AR change in smaller numbers than what HR does would be good, I'd love to be able to bump all 140+bpm maps to ar9 and all 180+bpm maps to 9.5 instead of only having the option of either low AR or AR10(hr).
But I think it shouldn't give any score multiplier for increasing AR nor reduce for for lowering it.
For HP, while I would appreciate lowering HP on some of the maps I can't pass, there already is NF for that and that one is pretty well balanced (0.5 score and -10%pp). While often even 0.5HP can be the difference between passing and failing a map, it would essential do the same thing as NF - a binary pass or die scenario. So I'd say there is no need for that.
CS - allowing increase of CS would be good and it could even give a bit of extra score multiplier, lowering CS should be penalized a lot though, there are map that are mainly hard thanks to their CS so allowing getting top ranks on those by lowering CS would be bad.
OD - increase of OD has no point and should not award anything extra, it doesn't make anything more "comfortable" to play like the other stats. Lowering OD could be a thing but just like CS heavily penalized (or even unranked to avoid the free SS's)
Generally allowing AR change in smaller numbers than what HR does would be good, I'd love to be able to bump all 140+bpm maps to ar9 and all 180+bpm maps to 9.5 instead of only having the option of either low AR or AR10(hr).
But I think it shouldn't give any score multiplier for increasing AR nor reduce for for lowering it.
For HP, while I would appreciate lowering HP on some of the maps I can't pass, there already is NF for that and that one is pretty well balanced (0.5 score and -10%pp). While often even 0.5HP can be the difference between passing and failing a map, it would essential do the same thing as NF - a binary pass or die scenario. So I'd say there is no need for that.
CS - allowing increase of CS would be good and it could even give a bit of extra score multiplier, lowering CS should be penalized a lot though, there are map that are mainly hard thanks to their CS so allowing getting top ranks on those by lowering CS would be bad.
OD - increase of OD has no point and should not award anything extra, it doesn't make anything more "comfortable" to play like the other stats. Lowering OD could be a thing but just like CS heavily penalized (or even unranked to avoid the free SS's)