1. First change is that hold factor is no longer a binary value, (1.25 if a note is held, otherwise 1.0). It is now 1.25 for the first held note, and increased by (1.65 - hold factor) * 0.5 for each additional hold note.
2. Hold addition logic is still the same as before, but with the new sorting logic is no longer able to be obtained from hold notes starting on the same beat. Can only be awarded from earlier hold notes.
3. If multiple holds share the same end time, then only the leftmost one gets the bonus, would like to hear feedback on this. This is also how it works currently but based on first note listed in .osu file.
4. Individual decay in a column is reduced to 0.18 from 0.125 (.82 reduction from .875 reduction) while a note is being held.
   
   1. Time after a note is released is decayed as normal until the next hit object in that column.
5. The tail of a hold gives individual difficulty to it's respective column with a base value of 0.7. (Heads for taps and holds is 2.0 normally).
   
   1. Hold factor for this note as well. Starts at 1.0 and increases by (1.30 - hold factor) * 0.45 for each hold.
6. The tail of a hold gives overall difficulty with a flat bonus of 0.35. (No other modifiers). (Heads for taps and holds is 1.0 normally).

1. Originally the code would find the largest difficulty value in fixed 400ms sections, do a decreasing sort on it, then do a weighted sum.
   
   1. The weight ratio was changed from 0.9 to 0.92. Since the value of series now converges towards a larger value it is then multiplied by 0.8.

1. Triumph & Regret (5.46, 4.12) -> (5.34, 4.08)
2. Heaven's Fall [Bye4Now's Advanced] (2.73) -> (3.36)
3. Heaven's Fall [Bye4Now's Hard] (2.95 -> 3.30)
4. 4K Dans la mer de son [Toaph's Abyss] (5.23 -> 6.39)
5. Puffs Rave (Jakads' #SDVX_Edit) [SOUND VOLTEX IS | TAKEN OVER BY OSU!!] (792.28 -> 3490.71) Hmm...

1. Side note: Songs below 2.5 stars are affected by this, but by a reduced linear amount.
2. Song is broken up into 400ms sections, but this time each section contains the sum of all hit object difficulties rather than a singular max. From these a max and an average is computed.
3. We then compute what I call the 'error' in the difficulties. For each section we increase the error by the given equation.
   
   1. ((strains_maximum - strain) / strains_avg) ** 2.25
   2. If most values are near the average, then it behaves like: (max/avg - avg/avg) -> (max/avg) - 1. So having an average near the max reduces error.
4. This value is then averaged by the number of 400ms sections.
5. Using this we decide if a song should be punished or rewarded based on the error.

rating_weight = min((star_rating / 2.5), 1.0)

final_rating = (1 - (.02 * rating_weight)) * star_rating

if avg_error <= 0.13:

  bonus = 1 + ((((0.13 - avg_error) / 0.13) ** 1.80) * 0.10) * rating_weight

  final_rating *= bonus

elif avg_error > 0.13:

  penalty = 1 - ((0.12 - (((max(0.15 - (avg_error - 0.13), 0.0) / 0.15) ** 1.45) * 0.12))) * rating_weight

  final_rating *= penalty

return final_rating

1. Bonus can range from 0% - 10% (error 0.13 - 0.0)
2. Penalty can range from -12% - 0% (error 0.28 - 0.13)

1. Triumph & Regret (5.46, 4.12) -> (4.59, 4.00)
2. Nirvana(Camellia's "BinaryHeaven" Remix) [Ascension] (4.35 -> 3.83)
3. Fascination MAXX [_UJ's 4K Fascination] (4.73 -> 5.28)
4. Tsukidokei ~ Luna Dial [Lunatic] (3.78 -> 4.01)
5. Galaxy Collapse [Cataclysmic Hypernova] (6.43 -> 5.72)