1. Pain destroyed Konoha (Which is not that big), and made a small mountain with Chibaku Tensei. Whitebeard casually quaked Marineford and the sea beyond it, and could easily cause tidal waves by creating quakes on the bottom of the ocean that would have envoloped and destroyed much or all of Marineford, if not for Aokiji.
And I'll note, those are actual earthquakes. Those on Marineford didn't instantly die. So it's a wide area effect, but less destruction within the area.
And more to the point, how many people have destructive power above that of Pain in OP? 3 or so?
Genjutsu is so laughably useless in damn near all cases that do not involve a Sharingan,
Non-sharingan genjutsu by Itachi really did a number on Naruto even when he was using the anti-genjutsu technique.
It's often less worthwhile, but we generally see it used against people with very, very high genjutsu resistance.
Utterly unlike, say, Luffy, who's quite vulnerable to mental stuff.
and you forget that certain sufficiently powerful characters, Whitebeard, Kuma, Enel, Kizaru, etc., are at the very least powerful enough to kill any Naruto character near them.
That's true, I'm not saying that OP's super elite isn't still more powerful, I'm saying the gap is a lot smaller than it used to be.
Consider how many non-Logia OP characters can take a hit from Killerbee's oxtopus chakra blast or a high-tailed Kyuubi blast. I'm not sure if any of them have the durability to take it, and only a few have the power to block it.
As for Kamui, only Kakashi and Madara have abilities kind of like that, Kakashi would never get the chance to use it (What with Konoha being instantly obliterated),
If they happen to be right at Konoha, hardly a neutral circumstance. Not even the likes of Kizaru or Kuma would instantly destroy the village either. Heck, nor would Whitebeard, he'd wreck the place. That's really a feat only Enel with Maxim is going to be doing.
If it's a fight in a neutral battlefield, Kakashi has a good chance of getting a kamui shot against a powerful OP character via stealth.