Hope for Sett's kit
I hope considering his story literally talks about how he's a pit fighter,lacks formal training,and brute forces his way to victory he has a more simplistic and down to earth kit. Maybe have something like a temporary buff ability and a reckless charge that slows him if he misses but drags someone with him if he hits it. A nice simple brawler kit that doesn't contain a paragraph of stuff. Maybe summon a goon or two to get those two lackeys from the splash art in on the action like summoning a custom minion/pet.