I think unfortunately we have come to a dead end after 3 generations....I have tried breeding with them, but no luck....
Yes, If it would breed, I agree going back to a multifloral would be the way to go, crossing it back to another brachy, would just make it look like any other brachy. Personally, the best cross would be to cross it onto a Paph. Lady Isabel...
We'll know in about 2 years. Frank made a couple versions of this cross right after Paph. Crystelle got the AQ/AOS. I haven't been able to talk him out of any of those seedlings.