Some outros have a flourish followed by an ongoing beat that stops short, ending on the last beat of the measure. In these instances, there needs to be a final hit at the end - one additional measure of only one beat with kick + snare + cymbal. (See some of the Latin songs.)
Also…
Could we please have a cadenza collection? Often it is nice to end a song that way. Example: after the double-tap to trigger the outro, holding down the switch could trigger the cadenza that would continue until the switch is released, followed then by a final hit.