My perspective is one of a fan of the single player FF games as opposed to MMOs in general.
I am well aware I will never beat the top content in a MMO without dedicating time to practicing and forming a static team. I am fine with that.

I am disappointed that this game (and XI too? Never played) places story content behind the tougher fights. I don't recall anything nearly as significant as Coil's storyline happening when you beat the superbosses in other FFs.

And yes, I would love an eventual story mode of t6+ as well.
It is of course up to SE whether or not this is a good idea or a worthwhile investment of resources.
I am simply saying it's something I would enjoy.