Buffs to things besides raw damage output would make marksmen more diverse

think about it

the ADCs that usually get played most in the highest brackets (and barring Kalista, are regarded as much healthier when they're good) are the ones that bring something other than damage unless they were REALLY GOOD at doing damage (also , nerf when? ) the main exception is Ezreal but he's in a league of his own with the combination of mobility and poke he possesses, not to mention blue builds

Maybe marksmen shouldn't be balanced solely around rightclick power? both have kit problems that makes them easily fall out of meta when someone can rightclick stronger than them from similar ranges (not currently but in the past ) because that's basically all they have -- damage output that's entirely dependent on items, and range. There's not much reason to play them unless they're overpowered; they either have the stats or they don't. I would lump in here too because he only does damage, so the only way he's good is if he does a shit-ton of it, but he at least offers mixed damage and has a lot of skillshots etc

I think that's the direction Riot should look to, when they give Tristana and Kog'Maw a pass over; a means to do something else for their team, so that their worth isn't solely determined by having enough items to make an impact.