What I'm saying is that the skillsets look similar
maybe I'm misinterpreting you but w/e
If you look at the skills basically like, aoe stun skillshot ult, of course you will see them pop up everywhere. But look at Diana's Q for a second, its an arced skillshot. Something unique. Zac's leap is also unique(charge time = distance). Lissandra's skillset is even unique if you look past the generic parts of it. Skillshot, root/aoedamage, Skillshot/miniflash, Shield/Stun ult. Name another champ who gets that exact skillset.