A comment from the peanut gallery: as soon as you start to cavil over precise mathematical options and apply them to music, I get nervous.
There is a tendency for people who regard their music as a science rather than exclusively an art to want things musical to adhere precisely to a formulaic approach.
Even J.S.B. didn`t do that!
I can sort of understand why someone would like to have this as an option, but I am not sure I would like the music that results from using it.
I am old school enough that I like music to at least sound like it could have been made by a human being more than a machine. Someone else in this thread mentioned the human element needing to be there in accel or rand passages. I agree 100%.
Maybe I am just old and in the way again.