I think you, Coach Steve, and OgManimal might be the only ones left who disagree with Kano's fairing vs the top 10 lol.
So you have Raiden, Quan Chi, Scorpion, D'Vorah, Sonya, Erron Black, Cassie, Jax, Kung Jin, and Sub-Zero. This is pretty much the Top 10 agreed upon within the scene, just the order is debated at times. Now considering competitive variations only we have this.
Kano dominant MU's- none.
Kano adv. MU's- Hollywood Cassie. 1 total variation.
Kano even MU's, but possibly can be advantage- Bojutsu Kung Jin, Covert Ops Sonya, 2 total variations.
Kano even MU's- Summoner Quan Chi, D'Vorah Venomous, Jax. 5 variations counting 3 of Jax.
Kano even MU's, put possibly can be disadvantage- Swarm Queen D'Vorah, Special Forces Sonya, Grand Master Sub-Zero, Thunder God Raiden, 4 total variations.
Kano bad MU's- Inferno Scorpion, Spec Ops Cassie, 2 total variations.
Kano death MU's- Hellfire Scorpion, Outlaw Erron Black (since post patch effects other MU's much more than this one). 2 total variations.
So we're looking at something close to no dominant MU's, 1 clear adv, 2 possible adv, 5 even (3 from one character), 4 possibly bad, 2 bad, and 2 really bad vs variations of the Top 10. As a whole, I'm sure everyone doesn't agree on all of it since we're all different people, but that seems to be the general standing at this point.
If other characters start getting buffed up and Kano gets nothing he'll just gradually slide down the ladder while others catch up, and eventually end up the Grundy of the game. It's why I think he'll need some additions as time goes. Nothing too crazy, but a few little things to keep him in the competitive scene.