I wouldn't mind some sort of leaderboards.
But they would have to separate them by console.
It's easier to play on PC rather than on Xbox or PS4
FPS is deff easier to play on PC,while arcades games are somehow easier on console.Atleast from my experience.
But you can always make separate leaderboards.
I agree, aiming is easier when you have mouse

but consoles are better for some other genres
