Nocturne seems messy as a champion

Don't get me wrong. I love Nocturne, and he is one of my favorite champion to play, but it feels like Nocturne wants to do what so many champions can already do. He wants rapid, sustained damage when he fights, just like Master Yi. He wants to create presence from long-range, like Pantheon. He wants to be able to kill someone from the fog of war, like Vi, Kha'zix, and Rengar. He wants to fight like a bruiser, but he also wants to be an assassin.

Consequentially, Nocturne seems confused on what he wants to do. He wants be almost like a Jack of All Trades, but his abilities seem to be outclassed. If you want to have sustained damage, Yi outclasses Nocturne. For a long-range ability, there is Pantheon, who has a larger range of impact. For jumping out of nowhere, you have Vi, Kha'zix, or Rengar, who insta-gibs whereas Noct takes a few seconds. For bruisers, we have Jarvan or Trundle, who have natural tankiness. For assassins, we have Vi, Kha'zix, and Rengar, who can assassinate much better.

I just feel like Nocturne should have a defined strength OR a few tweaks to his kit, like maybe a bit more damage, better reliability on his CC, improved Spell Shield, or longer range or lower CD on his Ult. He's just outclassed in several ways, and I think it'd be nice to show a little bit of love fear for our nightmare.