The actual execution was a mess, but Skullface's inspiration for his parasite weapon being the experience of linguistic imperialism as a child was a really novel premise. The idea that he would get his revenge by creating a weapon that killed anyone who spoke English is some cool super-villain shit I don't think I've ever encountered before. "Race-selective" weapons, genetic-targetting weapons, religious indoctrination viruses, I've seen all those, but I think MGSV is the only time I've encountered a weapon that targets a language community.
Seems like that's how it goes with most "Auteurs". They might be very important to the whatever final product they have, but they're still just people and need other experts and collaborators to keep them balanced.