The community was apparently frustrated with Blizzard for a lack of communication concerning the issue, but it looks like that was due to the fact that their heads were down as they worked to understand the problem. It was explained that they didn't want to just roll out a quick bandage, as that would likely cause unforeseen issues down the road. Instead, they're crunching the numbers and digging into the code in the hopes of discovering a legitimate source of the problem.
Again, I play on Hoard side. I had an issue with the War Campaign guide. The guide suggests I pick up the “Wanted” posts at each outpost. I was not able to pick up these until I had finished unlocking all three outposts and the World Quests. I was able to proceed with some of the guide by manually double checking them to X, but the guide didn’t work quite right after that. I had to go back and pick up the next Outpost then it would be ok, until at the next location I needed to X the Wanted quests again.
Heirlooms. At the bare minimum you make sure all the armor pieces upgraded to 110, since this is the lion's share of your experience increase. Neck and Ring upgrades are secondary, but still important due to being able to enchant them. Trinkets can't be enchanted, but you'll want them at max as well, if only to save time by not having to worry about replacing them as you level.
N Nagrand Alliance Nagrand Horde Nathrezim Alliance Nathrezim Horde Naxxramas Alliance Naxxramas Horde Nazjatar Alliance Nazjatar Horde Nefarian Alliance Nefarian Horde Nemesis Alliance Nemesis Horde Neptulon Alliance Neptulon Horde Ner'zhul Alliance Ner'zhul Horde Nera'thor Alliance Nera'thor Horde Nethersturm Alliance Nethersturm Horde Nordrassil Alliance Nordrassil Horde Norgannon Alliance Norgannon Horde Nozdormu Alliance Nozdormu Horde
K Kael'thas Alliance Kael'thas Horde Karazhan Alliance Karazhan Horde Kargath Alliance Kargath Horde Kazzak Alliance Kazzak Horde Kel'Thuzad Alliance Kel'Thuzad Horde Khadgar Alliance Khadgar Horde Khaz Modan Alliance Khaz Modan Horde Khaz'goroth Alliance Khaz'goroth Horde Kil'Jaeden Alliance Kil'Jaeden Horde Kilrogg Alliance Kilrogg Horde Kirin Tor Alliance Kirin Tor Horde Kor'gall Alliance Kor'gall Horde Krag'jin Alliance Krag'jin Horde Krasus Alliance Krasus Horde Kul Tiras Alliance Kul Tiras Horde Kult der Verdammten Alliance Kult der Verdammten Horde
Aegwynn - Alliance Aegwynn - Horde Aerie Peak - Alliance Aerie Peak - Horde Agamaggan - Alliance Agamaggan - Horde Aggramar - Alliance Aggramar - Horde Ahn'Qiraj - Alliance Ahn'Qiraj - Horde Al'Akir - Alliance Al'Akir - Horde Alexstrasza - Alliance Alexstrasza - Horde Alleria - Alliance Alleria - Horde Alonsus - Alliance Alonsus - Horde Aman'Thul - Alliance Aman'Thul - Horde Ambossar - Alliance Ambossar - Horde Anachronos - Alliance Anachronos - Horde Anetheron - Alliance Anetheron - Horde Antonidas - Alliance Antonidas - Horde Anub'arak - Alliance Anub'arak - Horde Arak arahm - Alliance Arak arahm - Horde Arathi - Alliance Arathi - Horde Arathor - Alliance Arathor - Horde Archimonde - Alliance Archimonde - Horde Argent Dawn - Alliance Argent Dawn - Horde Arthas - Alliance Arthas - Horde Arygos - Alliance Arygos - Horde Aszune - Alliance Aszune - Horde Auchindoun - Alliance Auchindoun - Horde Azjol Nerub - Alliance Azjol Nerub - Horde Azshara - Alliance Azshara - Horde Aggra (Português) - Alli... Aggra (Português) - Horde Azuregos - Alliance Azuregos - Horde Area 52 - Alliance Area 52 - Horde Azuremyst - Alliance Azuremyst - Horde Ashenvale - Alliance Ashenvale - Horde
The WoW token is very simple: You pay Blizzard $20 for a token, and then you can sell the token on the in-game auction house. A player with gold can buy a token and redeem it for a month of WoW subscription time or for $15 of Battle.net balance, which is like a gift card credit that can be redeemed in WoW or other Blizzard games such as Hearthstone and Overwatch. You get their gold; they get your cash, or at least most of it.
These two expansions are virtually identical in terms of exp/h. I personally favor Mount Hyjal, and think it's very slightly faster. But if you know Jade Forest well you can just as easily keep up there. Ultimately you'll end up doing both anyway, so it's mostly academic. Every time I've tested Valley of Four Winds or Deepholme, or any other zone in MOP/CATA's level range, they were worse exp/h. You should not even need to complete both zones to ding 91, so it's more important to just pick one and go.
My second least-favorite part: leveling ranges. Zones are divided into leveling ranges; some are for levels 10-60, others for levels 58-80, and so on. On the surface, that appears to make sense; while there are odd moments where you're presented with the content from two expansions at once, it does mean that you're more or less going through content in order, at least by expansion if not by level.
Baelgun - Alliance Baelgun - Horde Balnazzar - Alliance Balnazzar - Horde Blackhand - Alliance Blackhand - Horde Blackmoore - Alliance Blackmoore - Horde Blackrock - Alliance Blackrock - Horde Blackscar - Alliance Blackscar - Horde Bloodfeather - Alliance Bloodfeather - Horde Bloodhoof - Alliance Bloodhoof - Horde Bloodscalp - Alliance Bloodscalp - Horde Blutkessel - Alliance Blutkessel - Horde Boulderfist - Alliance Boulderfist - Horde Bronze Dragonflight - Al... Bronze Dragonflight - Horde Bronzebeard - Alliance Bronzebeard - Horde Burning Blade - Alliance Burning Blade - Horde Burning Legion - Alliance Burning Legion - Horde Burning Steppes - Alliance Burning Steppes - Horde Bladefist - Alliance Bladefist - Horde Blade's Edge - Alliance Blade's Edge - Horde Booty Bay - Alliance Booty Bay - Horde Borean Tundra - Alliance Borean Tundra - Horde
If you already have a high level character or a friend willing to give you gold then you can purchase Heirloom items. These items are bound to account and are accessible through the Heirlooms tab using Shift+P. The benefits of these Heirloom items is that they scale with your level keeping your gear up to date without you having to worry about upgrades, and they provide a significant XP bonus.
Guild Banners. The Banner of Cooperation and Battle Standard of Coordination will increase the experience from kills. They both have a 10 minute cooldown, but when you use one, the other is only locked out for 2 minutes. I was very bad about using these, so it might be worth using a macro to drop them on your first attack against an enemy. Keep in mind you must have reputation with your guild before being able to buy these, so new character may have a bit of a wait before picking them up.
Congratulations on reaching Level 120! There are a myriad of new things to do. The first thing you should do is head to your faction hub ship where you have been doing your mission table quests and footholds to pick up and complete the quests necessary to unlock World Quests. World Quests will provide you an opportunity to grind reputation levels, acquire gear, and gather Azerite. There are tons of new things to do that we will cover in our Level 120 Battle Guide found here: Level 120 Battle Guide