I’ve built the blue warbler. It has a standard trem mode and warbll-y vibrato (like the Bigfoot fx Magnavibe sound). Which is kinda cool in its own right.
Honestly I like the idea of the dynamic depth, but I haven’t played with it like that enough to really say. I think the nightwire looks cool since the envelope could also control speed instead of just amplitude. I think there’s a way to do that in analog, just would take a good bit of fiddling.