If I was suddenly chief editor of Marvel, and any changes I made would be permanent there's one thing I would fix1. And that thing is the scientific name of the Inhumans. Currently it's either Inhomo supremis or Homo sapiens inhumanus, and both of those are stupid. The Inhumans aren't different enough to require a new genus (yes I'm aware that one of them is a dog and another is a door); if both the Eternals (Homo immortalis) and the Deviants (Homo decendus) are still Genus Homo, then the Inhumans are still essentially human. On the other hand, they're clearly different enough from baseline humans (read: one is a dog, another a door) to deserve a separate species; if the Mutants (Homo superior) get their own species, the Inhumans deserve one too.
As for what their new scientific name would be, I'd probably just go with Homo supremis or maybe the dumber sounding Homo inhumanus.
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Okay, there are actually a lot of things I would fix - One More Day, for example - but that's not what's bouncing around in my head right now so let's just pretend there's only one thing for the sake of this post.