Is It Possible to Kill a Retroflex Fricative?

When Iorio was writing up the sound changes from Iorio to Malvis, one of the things he had in mind was that retroflex fricatives would become just a regular apical fricative. Alex Fink actually pointed out to me like, that doesn't seem motivated in any way. He suggested it might be more realistic if I restricted that only after high vowels and that's what I ended up going with. But that's something I think if you weren't, if you didn't have that kind of phonetic background, that's one of those semi-plausible sound changes that one might have come up with if you were just starting with this little bitty framework