The stats are too low. I totally understand that you’re meant to play him when he’s invisible, and that you ‘should’ be penalized for not maintaining it, but the stats are ridiculously low. There should be some margin for error, but in this case there isn’t.
His health pool is 28k for a 6-star R3. On average, you will find that R3s have about 36k health. That’s 30% lower than an average R3.

Perhaps even more concerning is the following, the block proficiency, which is set to 55%!

Now, I understand that SS is a glass cannon, but when you compare him to another one, Hit Monkey, you will notice the following:
1) SS has 10% less health than HM
2) SS has 10% less attack than HM
3) SS has 15% less critical damage rating than HN
4) SS has the same block proficiency as Hit Monkey
I would agree with the stats, if SS was a glass cannon in all matchups, or if he could take advantage of regen in every fight.
But the fact of the matter is, is that the AI is weird, and dropped inputs are still a thing, so the bare minimum needs to be maintained for vanilla matchups! You can’t set the bar lower!
There were concerns from the deep dive that the damage was too low, and you (Kabam) came out saying he’s perfectly balanced. But he’s not. Damage isn’t everything, you need to look at sustainability as well.