I have almost finished the Kul Tiras story. I'm have to do the Siege of Boralus dungeon. It would have been nice if Blizzard had actually noted that Siege was a Mythic-only dungeon in the quest text. It was very confusing.
Actually, this is a bit of a general problem so far at max level. Blizzard isn't providing obvious directions that I think should be provided. For example, emissary turn-ins. I finished a Champions of Azeroth turn-in and I had no idea where Magni was. Apparently there's a portal to Silithus in Boralus? When did that happen? Same thing with the Tortollan emissary.
Dungeons so far are interesting. I finally got to i305 and started doing heroic dungeons.
It's kind of weird doing the Horde dungeons. Normally during an expansion, I've done all the quests beforehand and know the story for each dungeon. But now you enter a Horde dungeon, and there are trolls and gold and dinosaurs running around, and you have no idea why. Especially when a boss is talking smack to you.
If the tank pulls one pack at a time, heroic dungeons are pretty easy, even at minimum item level. If she pulls multiple packs, all bets are off.
I did get my item level up to 312 or so, thanks to a couple lucky drops. Perhaps that's enough to start tackling Mythics, at least with my guild.
I also did an island expedition on Normal difficulty. I'm not too sure what to think. The thing is that we were rushing to gather Azerite so fast that you couldn't really understand the nuances of the place. Apparently the opposing faction NPCs have really cool AI or something, but everything went by in a blur, so I'm not sure what really happened.
I kind of wish it wasn't a race, and there was more room to slow down or be strategic. But I don't really know how you would accomplish that. Maybe increase the damage and disallow resurrecting when you die.
The only thing I noticed about the Horde NPCs (a blood elf mage team, I think) was that they jumped an awful lot while fighting. So kudos to Blizzard for successfully imitating human PvPers.