Battle for Azeroth adds two continental landmasses each comprised of three large areas. For the first time in WoW history, Alliance and Horde players will level to cap separately, with Horde players starting on Zandalar, and Alliance players starting on Kul Tiras. At max level, Horde and Alliance players will invade each opposing isle to continue the story.
An important aspect to crafting professions in BfA are the warfront contributions. During the contribution phase of a war front you will have to turn in various crafted items to help the war effort. During this time you can make gold with all the professions in the game if you are crafting the items that are currently required for turn-ins. This effect is pretty much the same across all the professions, so I will not be mentioning it specifically.
This leaves players chasing an endless loop of trying to get higher level Azerite gear — which can only reliably be gained through raids and isn’t available in Mythic+ — but only the pieces with exactly the right traits will actually be an upgrade. It’s even possible that some items that should be huge upgrades are nullified by the loss of a specific trait that makes one ability do more damage than the others.
Restoration Druid's role in the raid edges slightly more towards healing big damage spikes. We retain all the powerful options we had before to do so: Incarnation: Tree of Life, Flourish, and Tranquility. Unfortunately, this playstyle leads to a significant loss in steady healing throughout a fight. However, being able to cover harder parts of the encounters has been historically a very strong niche to fill, assuming your throughput is competitive with other healers in the raid.
The upcoming raid, Battle of Dazar’Alor, tackles this problem by having the Horde and Alliance have two raid stories — and the opposite faction will temporary flip sides for flashbacks that show the whole story. The Alliance storm the Zandalar capital and gain a massive upper hand in the war. From there, the writers will have to balance a compelling Alliance story with the rising threat of the Old Gods (and, of course, the ongoing Horde story.)