Ranking =/= broken. In general, s tier mons are very splashable, which is one of the main things that distinbuish s from A+. Roaring moon was A+, Duraladon was A+, Gouging fire was A, etc. (I just scanned the changelogs, I don't remember what the mons specifically were before they were banned, but in general if something is so broken that it is S rank and broken it feels that it is much closer to quickban territory than suspect).
Other than that, I totally agree with you 100%. My original post was more trying to say despite its relatively small movepool, its stats and ability are so broken that that, more than its movepool, is where it gets its variety. Additionally, I was just replying originally to the idea of rocky helmet Ting-lu. What I was trying to do, and perhaps failing at, was to show that ting-lu has more variety than most people see initially. It feels (though perhaps it is just my perception), that a lot of the time on the forums people will look at a mon, see what it does best, and then say it doesn't have that much variety because it excels at that one thing and mostly ignore what it might be good at (for example, rest talk ting lu isn't excellent, but niche, so I would say it is merely good, compared to its hazard setting sets which are excellent and very common). This leads to people viewing certain mons as one dimensional.