You can't just have an unlimited amount of new mechanics. People complain of them being reused but at least they're in different ways or variations. Sohr Khal had mostly new mechanics as well.....also your review is extremely biased. You have to base on WHAT YOU CAN EXPECT not on all your hopes, dreams & things that just won't happen. Like did you really expect an "open" dungeon after all of 2.4 - 3.x linear dungeons so far? It'd be illogical.

Mcach is a good fun Raid with intetesting mechanics. Visually impressive.

Sohr Khal is pretty good with fun bosses(bar moogle)

HB HM is a rehashed HB with one okay boss, adds, & a poisonous meatbag.

Nidhogg is incredibly fun(as long as you have a good party) with amazing music, & my absolute favorite Trial.

Aquapolis is RNG on top of RNG 8x with meh rewards until the last room, but is kinda fun & something different.

Relic is quite nice, much easier than 210 yet still grindy enough to pass time w/o slamming your face into a broken mirror

Moogle is Ixali with pricey rewards.

PVP Shatter is actually pretty fun, it's nice to focus rocks instead of being swarmed to death, but the PVP itself still feels horribly unbalanced and terrible.

Overall for 3.x I'd say it's much better than 3.1, worse than 3.2 & 3.0.
5 or 6/10

Anyway...why did I post this again?