I would like to make the point that Inhumans have been around since, X-men, really.
They may have started out as interesting, characters, but eventually grew. Within less than 10 years they had their own book/title.
Carol Danvers starts in the original Captain Marvel series, which ENDS
and then a few years later becomes Ms. Marvel, eventually becoming Binary, Warbird and Captain Marvel.
If she can do that, than Inhumans can also be more realized and utiilzed.
Ned Leeds. Was he conceived to be Hobgoblin? Nope.
Not all characters are meant to be something else,
but in the Marvel Universe that is the way it rolls.