Hey, yea I'm quite aware and capable of doing swells with a vol pedal. They are awesome in their own right.
What I and talking about in my query is more in the nature of the auto swell on the DL-4 or in the upcoming Timeline. Given the programming prowess of the Eventide stompboxes, I would think this should've easy enough to put up as a feature on the Timefactor. Sooner than later.
Everyone else interested in the this specific delay type, do chime in!