Current State of End-Game Contents - A Blog Post from A Japanese Player

[Fyce]

but for example stuff that has an "echo" buff should be steamrolled.

As Edli said, it's debatable.
But that made me think about something: the current echo buff is poorly designed. Or, at least, only helps in a non-instalkill situations.

As you said, stats only won't suddenly make a bad player avoid Twintania's dashes or tornadoes. It help getting through a few "checks" but it doesn't keeps you safe from some insta-death stuff.

I'm currently fine with it, but I would like to see another kind of echo for really late people.
For example, when 3rd Coil will get its weekly restriction removed, everyone, at that point, should be able to down T5 no matter what. It's currently the case with HM primals (except for Titan, which still has some insta-death stuff, but most of the deaths at Titan don't come from Landslide. Plumes are the real killers here, and that can be avoided with echo+overgear).

So, what can we do against insta-death stuff which will hold some people back? Well, I would actually like to see an Echo buff which, instead of giving you a stat buff, would allow you to die once, and then get you back up automatically at the same spot you died, with a little complete invulnerability frame (so you can get out of T5 fire, for example) and would not give you the "revived" debuff.
This would allow your whole team to survive a team wipe because of, say, a failed Twintania dash or a late Twister escape. Same goes for Primals "Ultimates". For example, Ifrit's nails would be completly optionnal (you would still have the option of doing it in order to boost your LB bar up) because the team wipe that would follow will be completly negated.

Obviously, this "echo rez" would only be put on very old content which can hold people back.