Aesthetically the zone is a little forgettable. It is yet another verdant magical forest zone, in a game that is already heavily oversaturated with them.
Teldrassil,
Ashenvale,
Moonglade,
Hyjal,
Shadowmoon Valley, the
Dreamgrove,
Val'Sharah,
Ardenweald,
Zereth Mortis, etc, and those zones were more unique than the relatively bland
Amirdrassil. They had more colors than just green, some of them had magical VFX on the water and rivers, etc. I felt that Amirdrassil especially felt like a copy-paste of Hyjal, Val'Sharah, and even WoD Shadowmoon Valley along the river. There are some things I like about Amirdrassil visually, such as the green sparkles or
floating trees, or being able to see a starry sky during day time, but the zone still overall feels
very samey as prior zones, too generic.
(EDIT: I just noticed that the Emerald Dream does actually have waterfall sparkles like in Ardenweald. Maybe it's the overpowering green filter that made it hard to notice them).
The one saving grace of the zone is that at least it isn't opressive. It looks and sounds pleasant enough which is imperative for an endgame grind zone you are supposed to toil in for dozens to hundreds of hours on end, which was a failing of Tanaan Jungle/Broken Shore/Argus/Nazjatar/The Maw.
The second issue is that there is zero difficulty. On Timeless Isle, you could die just pulling too many normal mobs. And then if you went up the ramp, there would be elites who would kill you if you weren't in a party. And the rare were effectively bosses who would kill many. Cinderfall and Huolon wiped many raids, even late into the patch. But here, even on launch day there is zero danger whatsoever. You can wander around anywhere, pull every mob in sight, and meh you won't die. There is no feeling of accomplishment killing a rare either.\
The third issue is how tedious the Dream Warden rep grind is. You are constantly flying around right clicking seeds, and getting 20-40 rep per minute. You need 2,500 rep to advance one renown level and you need to reach renown level 20 to get all of the rewards. The one time sidequests only give you about 5 renown levels worth of rep so that's about that is at least 20 hours of nonstop seed planting to reach renown level 20. Awful. You also run out of seeds pretty quickly so you need to do the Superbloom event to get more seeds, which takes 20 minutes and is tedious, so you're looking at maybe 25 hours of grinding for this one rep. Not even the Shaohao rep was this awful.
The questing content is meh. It lacks the mystery and wonder of prior elf forest zone quests like Teldrassil or Hyjal. Even Ardenweald had interesting stuff with the reincarnation cycle of the pods/eggs, and meeting spirits like Huln Highmountain or that alien stag who died fighting to save his world from old gods or the Legion (I forgot).
Another thing too is that Amirdrassil's story sounds repetitive. It is yet another night elf druid zone that is being corrupted by evil invaders and you have to go into underground burrows and wake up the druids from their slumber and you meet the wild gods and etc. Been there, done that.
A couple of the musical tracks are neat, but that's it. Otherwise a lot of it is forgettable.