From what I understand, T9 has too many different mechanics across four distinct phases, in contrast to everything else in the game (even Steps of Faith), whereas Final Coil sounds like it would be much more accessible with echo in comparison. There's still Savage mode so what's the problem if the mechanics of the gates are loosened? As I pointed out the gear is already outdated compared to WoD and Poetics, and the story is too closely tied to Main Scenario and Crystal Tower for it to be denied to the casual playerbase just to satisfy the ego of a few hardcore raiders.

Or in simpler terms: don't you think T9 was too complicated for its own good? From looking at many places like reddit, the mechanics and phases are unreasonable to all but a very tiny percentage of the playerbase, and I think it is unreasonable to say demand Coil storyline and (obsolete) High Allagan Weapons be exclusive to a hardcore few.