While 8.2 offers a lot it is one grind on top of another grind. Getting to level 50 on your heart of Azeroth is already a pain in the ass and weeks of grinding that is SEVERELY unfriendly to alts as the Heart is not account wide. In 8.2 instead of addressing this grind it is turned up to 11
On the PTR when you turn in the quest unlock the Heart Forge you are bumped up to 55 which unlocks the major and minor slot at 55. This appears to only be for PTR purposes and god I hope it is not. It took my heart from 47 to 55. To go from 55 to 56 requires 164,775 Azerite Power with the next minor essence slot being opened at 65 and nothing in between at the moment. If this goes live as is then 8.2 is dead on arrival.
They are still trying to keep this grind system alive despite the obscene amounts of feedback that this is not fun. Anyone coming back I am warning to to check back on this if large grinding was your primary reason for leaving.
Blizzard has got to be aware that a majority people who left maybe at best left with a Azerite level of 35 or atleast that is my experience with guilds that were dying prior to BoD. Now you need to take your heart from 35 to 50 then to 55 just for a minor slot.
This system is the most insane grind I have seen and remind you I played Korean grindfest MMO's for 9 years before I came back to WoW. You may say grinds are a normal part of MMO's and I will agree with you but there is no remotely effective path to grinding Azerite right now that anyone considers fun.
Azerite rewards will need to be boosted SIGNIFICANTLY if these values are going to stay in the game. Why content creators are just glossing passed this in their videos is beyond me but this will be a major issue for a lot of casual players and turn off a lot of raiders.