I finally got a chance to plug in headphones and test an effect (Flanged).
Stereo output is working fine, it's "inch 2" input that produces no audio on android, whereas on other systems it duplicates the mono mic channel for both inch 1 and inch 2. If I enable the mono collapse I typically have on my effects, it sounds as it should normally from a mono mic source.
The popup window I use in a few instruments for waveform customization crashes cabbage on android.
I'm getting about a half second delay, and semi-frequent dropouts... so not the best performance, but still really cool to play with!