That's a pretty strange way to class a villain in my opinion.

A villain is a villain, if they do villainous things and are opposed to the hero and actively work against them, then they're a villain, no matter how prominent they are. And I'm not really sure what point you're trying to make here in the first place. So because Hela hasn't always been a straight up villain from the get go, and perhaps didn't become more prominent as a villain until Simonson's run, that means that she's somehow not worthy to be the villain in a Thor movie?
I'm 100% stoked, Hela has always been one of my favourite villains and then Marvel went and cast my absolute favourite actress on the planet as her in a movie, it's like my ultimate fancast come to life. Thanks Marvel!

t: I'm so happy that Hela has been brought back to prominence in this way and has gained a load of new fans through this movie after years of being underappreciated and underused in the comics.