I was thinking about why cockroach mutation or the newest butterfly mutation for example have a mid-low reception while our beloved Leuco is sitting as the king of Mura's content engagement.
After a while, I think I finally understand. The main think that makes Leuco hot in the first place is the corruption + moral degeneration, which comes after the girl is consumed by the PARASITE. In the other mutation videos, the girl fuses/is assimilated by the insects, instead of turning into another one of the parasite's puppets for breeding. This happens as a attempt of copying the mutation style of Leuco, but done in a way in which it is just not as good as Leuco. You can see perfectly why Dancer Momoka x Leuco (my fav mura video btw) does fusion so well while Nana-Chan's cocoroach mutation is so mid when you notice that there's no parasite there and the girl turns into a monster girl intead of a parasited mess. If the cordyceps manages to do just like Leuco and make the proper corruption attractive to Rose Mocha, I think it will be to match Leuco (all of this is my opinion of course, sorry for any possible english error).