When trying to use vocal modes to make a voice bank sing expressively, I would like to change vocal modes mid-phrase as well as have gradual changes between the vocal modes. It is currently impossible to do that via groups. Thus, I believe that adding automation tracks for each vocal mode would be very helpful.
Join the club. We’ve been asking for this for a while now. There’s literally no point in having Vocal Modes if you only can use one at a time.