Hello! I coined a new term for omnisexual people who experience variying intensities for attractions towards different genders, while still liking all genders! This term/label is not "unnecessary" as it can be quite comforting and useful for people who like using more specific labels!
Think about it like the sexuality version of what fluidflux is to genderfluid :)
The wiki page: omniflux
Hope it's helpful!