Nocuturne, maybe a VGU Update soon?
Nocturne is a champ that need everything. A new lore, a visual update and a gameplay update.
First lore: Nocturne is a nightmare but where he beyond? Void or shadow isles? Now Nocutrne is just a ghost without really deep background, a nightmare that gets bound to the nexus and gos his own way their. They are still summoners in the lore. I think giving a spot in the void or the shadow isles based on other designs would make him more interessting.
Same with his gameplay kit: His ult is very nice, but the others spells are in a very bad condition. His passiv is just an ampowered auto-attack + heal (example fiora passiv) , his q just makes him stronger chasing enemy over long time ( is that an assain? chasing over long time? .... like W but needs hit a skill shot on low range), his W is a spell shield like sivir but the reward of attack speed is not worth for the long channel time. His E is a fear casted on 1 enemy , WW is able to terrify all enemies around him without cast time and gives him dmg resitance.
And finally to his Visual,
is not a nightmare ( based on lore, maybe just a nightmare for all visual designers) he is a old ghost that likes chasing enemies but isn'T able to ouplay them, because his kit just allow him direct 1 vs 1 without a good burst.