Halls of Valor was the only mythic we did where it actually felt "mythic," and that was pretty much only Odin's fight. Mythic 0 definitely just feels like heroic for slightly higher ilvl.
But that may in large part be due to running it with low-mobility classes and having to restart Odin a half dozen times due to "just slightly too slow in getting out of massive-template one-shot effects"
Darkheart Thicket was the only Mythic 0 where the added boss mechanics were really noticeable. Although it was pretty amusing on the last boss of Blackrook to realize that the "RP" was delaying the survivability buff long enough for the tank to get one-shot by the demon at the start of phase 2 if he wasn't popping defensive cooldowns/running away immediatly.
I only have 5 of the 11 main story quests done in Suramar but I can't seem to find any new quest lines. Are they time/rep gated or am I just missing something?
Thicket was very easy, when I said noticeable I didn't mean increasing difficulty, I meant "Oh, there's something new happening," many fights had increases in damage of abilities/speed of movement, but otherwise felt mostly the same. The flower adds on the tree boss in Dark Thicket didn't add much challenge, but they were noticeable new things, asking the group to kill the tangles so they don't spawn more addsThat's funny I thought Thicket was easy. And if you think its the only one where mechanics were noticeable you haven't done Vault of the Wardens, or maybe you just never did it on normal/heroic so missed the first mechanics. The last boss the mechanics are noticeable. Heroic was easy and Mythic was much more noticeable.