FPS without a mouse? VATS is doing some heavy lifting there
It’s a single player Action RPG, not an FPS. The best way to play it is with a controller. On a PC and with tons of mods, of course.
you shoot mainly in first person, it is a first person shooter “FPS”. A game doesn’t need to be exclusively an FPS to be an FPS
First person shooter is a genre, not the mere presence of first person shooting. First person shooters like for example Call of Duty have some RPG aspects, but they’re not RPGs either.
At most, I’ll agree with “RPG with FPS elements”, though even THAT is a bit misleading since the combat system doesn’t function in ways very similar to that of an FPS once you scratch the surface.
I mean, it’s an FPS as well as an RPG. Unless you’re going for a melee build, a Mouse is still going to be more comfortable for Guns or Energy Weapons builds.