Just updated to 0.15.27. It's a minor update that includes two new Chord presets. "Passage Chords" and "Soul Chords." Both are very nice. The Passage Chords preset is a breathy synth thing. The Soul Chords has 7ths, 9ths, and 11ths. Very complex and very nice. None of the big updates we're all waiting for, but worth the download. Hopefully Artiphon will bed increasing their update cadence.
The new Soul Chords preset should give us some good additional data points for reverse engineering the XML encoding of their chords.