So i just looked at the map and Hum...
Do anyone remenber how HP work in this game anymore???
like...
Why in f**king hell of all this drama, has nobody propose to just change all the note in the butterfly to new combo, making it passable with HR, cause that's how new combo WORK!?!
Then you just have the make the new combo be the same colour has the previous note where before the change, this way the map look exactly the same and GG!
I just tested it and it with HR and it work perfectly, with literraly NO need to change the HP, the slider, the look, or the playability of the map!
Basically the only change required is to add new combo colour.(and maybe not even, cause you can probably just edit color using the osu file)