Rounded forms.
"What is most important about these inclusions is that they are quite good prismatic forms, not that they are slightly rounded."
All these forms, and they are numerous in the RATTEd subsurface area and only in the subsurface area, are highly rounded and highly non-prismatic.
Some analogous forms in Earth rocks showing apparently amorphous features that "flowed" into depressions which were in fact still crystalline would support your contention that these are crystalline minerals.
Bob Clark