I feel like it would be a cool idea if Riot implemented a custom final kill animation for "weapon type abilities" (Chamber's guns, Sova's ult/shock, Jett knives). It would add a little more flair to the characters and it might incentivize using their abilities more to get final kills and such. Jett knives could have a wind/blade storm, Sova could have something to do with owls (Sova means owl in Russian) and Chamber could have something to do with the nano-bots that his guns are made out of.