What do you mean by "only by a small margin"? If something's broken, it's broken. There aren't different amounts of brokenness. If something is broken then it needs to be banned or at least questioned.
It's true that something is considered broken even if it is only slightly broken. But, wouldn't you be pressed to ban something like Darkrai before, say, Wobbuffet? There are priorities when it comes to banning, and that is what I meant by what I said.
We didn't handle it at all for the past four years, that's the thing. We barely addressed Stealth Rock at all, if anything we tried to avoid it. The reason for this thread is so that it gets the attention it deserves this Gen and we don't go another four years without doing anything about it. If it's decided that Stealth Rock doesn't deserve a test then so be it, but we can't just continue pretending it doesn't exist.
Yes, maybe the subject didn't earn enough attention. But isn't that why we should be considering banning other things first simply because they are more important? If SR was that broken, it would have been mentioned a lot more than it is and was, but this didn't happen.