I really like the Vs event, how it's fun for players to interact with.
I keep thinking about how great it would be if the day comes where there could be a lore event like this. This missions update seems like a pretty effective way implement that into game play. Think about it, maybe a mission could be "Win one match mode against Miss Fortune as Gangplank." Maybe the rewards could be the same but, I would definitely do them because I like the lore.