(would've replied earlier but I kept having Java issues)
First of all, the "it hits high", you can just duck it" talking point. I'm yet to find someone who didn't end up moving the goalposts for something else that can be ducked so I advise steering clear of that. If you're armoring through a projectile on reaction the hitstun gives you more than enough time to run up and close the space even if they tech roll. When I say Cage is less stamina dependant, I mean because you're able to link from some of his cancels without running.
Best air control in the game? Pretty sure Scorpion is a Shirai Ryu ninja, not a Shaolin Monk. His options are pretty strong but are also dependent on you being in the air, and are certainly more susceptible to trip-guarding than Kung Jin's. And for the record I would actually take Cage's JI2 over Scorp's current JIPs. Everyone's jump normals are better at some things than others, it doesn't just come down to which button you prefer to press anymore.
Scorp's D4 has more range than Cage's I'm pretty sure of that, but D1 and D3? Nope.
This is starting to sound like Smoke syndrome all over again where people were more worried about the potential consequences of his normals than how good his normals actually were.
Again, you can't directly nerf a FBC without it effecting something else, or hurting other character's run cancels or even running altogether. NRS's philosophy has always been to make changes if something isn't being used how they envisioned it. I think it's safe to say to say that if after two major patches that nobody's run cancels have been touched at all, then none of them fit that criteria and are fully intended, it's entirely possible that other things could be nerfed, and I think they will be, but whatever sentimental grudges, rather than actual systematic problems you have against Scorpion's tools, it's time to put them to bed. I don't remember the last time M2Dave was right about anything concerning discussion of meta and run cancels are here to stay.