Adjust some mod multipliers for initial leaderboard sanity

[peppy]

There may be others we want to adjust. Note that these are basically placeholder safe values (lower is better) so we can allow these scores on the leaderboard without people complaining about unfairness... unless they are complaining the multiplier is too low (which is fine for now).

RFC, mainly to identify any other mods which need to be adjusted.

[longnguyen2004]

There's also HT to think about. With the current multiplier (0.7x at default settings), it's significantly higher than both osu! (0.3x) and osu!mania (0.5x). This can lead to the leaderboard being filled with HT scores, on maps that don't have a lot of S rank nomod scores due to its difficulty (example), disincentivizing players to go for nomod.

[peppy]

There's also HT to think about. With the current multiplier (0.7x at default settings), it's significantly higher than both osu! (0.3x) and osu!mania (0.5x). This can lead to the leaderboard being filled with HT scores, on maps that don't have a lot of S rank nomod scores due to its difficulty (example), disincentivizing players to go for nomod.

Thanks for pointing this one out. I've changed the range to 0.1x ... 0.5x with 0.3x being the default multiplier at 75% playback.

[bdach]

Seems fine from a correctness standpoint.

I don't feel qualified to talk about the balance aspects but I can generally agree that starting too low is generally preferable to starting too high.

[TextAdventurer12]

I believe this is the curve on a graph against rate. I'm not a huge fan of the massive jump from 0.9x to 1.0x, since the difficulty change is definitely less than 40%, but I agree with bdach that underestimation is better than overestimation

[longnguyen2004]

I believe this is the curve on a graph against rate. I'm not a huge fan of the massive jump from 0.9x to 1.0x, since the difficulty change is definitely less than 40%, but I agree with bdach that underestimation is better than overestimation

There will be future changes down the line (see #25733), this is just to make sure we don't have a flood of HT scores on the leaderboard for now.

[cdwcgt]

if Synesthesia have 0.8 multiplier, so is that mean mania play with Timing-based note colouring need have 0.8x?

[longnguyen2004]

if Synesthesia have 0.8 multiplier, so is that mean mania play with Timing-based note colouring need have 0.8x?

Yes, but it needs to be turned into a mod first