Lets see the matchups then against these 16 variations, I'll put if (at least I think) Kano Wins, Loses or goes Even:
D'Vorah - Wins, Raiden - Even/Loses, Erron - depends on what variation you're thinking of but probably Wins, Scorpion - Loses, Sub - Even/Wins, Kung Jin - Even/Wins, Kung Lao - Even/Wins, Sonya - Wins, Cassie - Even/Wins, Jax - Even/Wins, Kenshi - not sure, Cage - Wins, Quan - Even/Loses, Shinnok - Even, Ermac - Even/Loses, Ferra/Torr - Wins
so (at least I think) he wins against at least 5 of those variations, goes even with at least 1 of them and loses, at worst, against 4 of them. That's decent. Oh and I'd guess he probably loses to Tanya because holy fuck her mobility is insane.
I think once we all discuss matchups more in-depth we'll realise that he can handle himself against a lot of the cast and slow down the rushdown pace of the game better than most. Playing Cybernetic Kano means taking advantage of people's impatience, throwing out so many knives seemingly relentlessly that they think they're safe to jump over them then anti-airing them or trip guarding them for their mistake. His "mixups" come from staggers, ie doing B31 throw or B312 because the 2 takes a while to come out and you can't tell if the string is being continued or not in that small amount of time. I mean yeah he's probably not S tier but he does pretty decent against a lot of the cast.
Well you're describing him like a rushdown character which is not how he should be played. As for "no mixup potential" that's incorrect, he does have "mixups" they're just not the traditional overhead/low ones. You can open people up with throws you know, I think that's something a lot of people don't get.
He doesn't need an overhead but if he got one it'd be a bonus.
I've never been stuffed out of up ball really, it's a pretty fast move so if you do it at the right time it's pretty effective and I've anti-aired with it a bunch of times. Kano ball is only something that should be used from full screen and/or on a read.
Up Ball is most definitely not his only way out of pressure, EX Kano Ball into full combo and EX Eye Laser into full combo are also more than viable get off me options.
Fuzzy guarding (at least in MK) is blocking one way to cover a faster option then changing your block to cover the slower option, so it is possible but you're not going to get it consistently because people can mix up the timing that they do their moves to mess with that. You can fuzzy Scorpion's vortex options on reaction though since his overhead is 25 frames and in Inferno his overhead demon is slower than his low demon. Scorpion is a bad matchup because of several things - his vortex/mixups, mobility, anti-zoning (which changes how Cybernetic Kano has to play, and not in a good way), hard to anti-air jump kicks/attacks and in some cases pressure.