I use batches to control playback speeds for movements but my movements are both effect based and position chases. As it stands now, I need to have a batch dedicated to "effect rate scale" and one set to "playback rate scale". It would be awesome if there was an option to have the batch fader just control whatever the lists default fader is set to so it can do both.
You could always change the master control set by holding choose and then hitting Playback Rate Scale or Effect Rate Scale when needed right above the playback bar.