Looper Stop.
When recording a loop... A) hit record it goes right to overdub, cool. B) hit stop it goes right to play, cool.
BUT, I often grab measures from a song section to use later for a solo. It would be awesome to have a dedicated STOP button so after I record a section it would simply stop and be ready for when I need it.
As it is now, I must hit STOP twice which often clashes with what I'm playing next.