This is an amazing find! The possibility had crossed my mind, but I wrongly assumed it didn’t work after 1 quick try (didn’t set up the following pattern delay right).
I had just a moment to try it out just now (will look in depth later), but at first glance, but it worked great for me: I copied the 1-bar freeze delay trigger from the first pattern (in a hurry) to trig 1 of pattern 2’s FX, as a quick way to get the same delay settings. For me, fading out the feedback all the way before introducing the next use of delay eliminated the delay-time-change artifacts—but only in this particular case, it’d be nice to figure out how to minimize those…
Loved the sound of putting the delay’s low pass filter on the previous pattern’s delay buffer!