The ability to automate/crossfade effects parameters that vary from scene to scene.
Ex: a patch with a lot of reverb will raise the reverb mix gradually when the scene is switched, or to a chosen speed instead of just jumping to that pre-chosen amount immediately.
I think this would be the same as the Kemper-style “morph” feature, for which there are several feature request threads already, though none have many votes.
We’ll see if the Mods want to merge the threads with this one or not
Great idea; best you can right now is to have trails on and let the time-based effects fade out on their own, but nothing you can really do the other way around.