Unlike Patra, that changes three times per week?
Probably because Moldorms are the simplest of the segmented enemies. They don;t really do anything. I do wish that the user had more control over special movements, like teleporting/phasing/added shots, for the large enemies, but I also realise that this would be incredibly problematic because of the internal handling.
I need to go back and compare the NES/FDS Patras too, in contrast with ZC, as I still sense that they're off somehow.