Currently spread rules go like so->
Under 3:30 - lowest difficulty required is a normal
3:30 to 4:15 - hard
4:15-5:00 insane
etc
However, in mania, taiko, and standard, there are additional "normal difficulty as the lowest difficulty" guidelines, which encourage easier normals if the set has no easy.
I think this causes a somewhat uneven progression in spread rules.
Over the years this has pushed the meta for Normal difficulties to be between what easy and normal would be, resulting in a lack of harder normals to help transition to hard difficulties. Advanced difficulties existing help a bit, but only just a bit.
Allowing harder lowest difficulty normals fitting with the current spread rules pattern seems fitting for both this and making the progression of what's allowed or not more even.
My proposal is this
If the drain time of each difficulty is between 2:45 and 3:30, the lowest difficulty of each included game mode cannot be harder than a Normal, but Normal as lowest difficulty guidelines no longer apply.
Under 3:30 - lowest difficulty required is a normal
3:30 to 4:15 - hard
4:15-5:00 insane
etc
However, in mania, taiko, and standard, there are additional "normal difficulty as the lowest difficulty" guidelines, which encourage easier normals if the set has no easy.
I think this causes a somewhat uneven progression in spread rules.
Over the years this has pushed the meta for Normal difficulties to be between what easy and normal would be, resulting in a lack of harder normals to help transition to hard difficulties. Advanced difficulties existing help a bit, but only just a bit.
Allowing harder lowest difficulty normals fitting with the current spread rules pattern seems fitting for both this and making the progression of what's allowed or not more even.
My proposal is this
If the drain time of each difficulty is between 2:45 and 3:30, the lowest difficulty of each included game mode cannot be harder than a Normal, but Normal as lowest difficulty guidelines no longer apply.