Dear David
As far as I know--and I tried to find out several times--Luis himself had no plans to publish whatever he had accomplished, despite my own entreaties and offers to help. Moreover, while I do not have direct contact with his widow, it is my understanding that access to the materials he left behind is not easy.
As far as the smaller sūtra goes, however, I myself will publish something (let's not get into my promising a date!) which will try to take into account all available materials, including a reconsideration of the Sanskrit materials published by Fujita who, however, actually normalized his texts to a degree that perhaps slightly misrepresents the tradition as available.
When I have something, I'll let you know.
Best, Jonathan