How about something like Midi Shaper for the pre-arranged ones since you can store multiple waves

Then you can configure a shuttle port to be "CC Smoothed" which will convert MIDI CC to CV out of the shuttle control (-5 to +5).

You can also configure a CV port on the shuttle as LFO Sample and hold. The frequency of the S&H can be adjusted by cc# so you can map a knob to change S&H frequency.