It should be easy enough to have a decay length/fade option if they add fades in the riff edit, it could automatically add this from whatever you have it set to.
I did this in the DAW, when I generate up a drum track it will decay the the cymbal hits over a few bars into the next section:
![[Linked Image - Only viewable when logged in]](https://www.pgmusic.com/forums/ubbthreads.php?ubb=download&Number=30172&filename=ReaTrak-Drum-Decay2.gif)