“The biggest struggle of overhauls like item scaling is being able to exhaustively test it,” he said. “You can’t expect any group of a few hundred people to go in and hit every piece of content that’s ever been developed over the past 15 years of World of Warcraft. That is difficult and challenging to do. What we did was listen to a lot of feedback from the PTR, what those changes looked like there. “The community is a great resource for helping us understand what we missed, and we were able to develop technology to be agile about fixing the problems very quickly in a live environment when we did come across them. We did have a few hiccups when we launched the patch in terms of scaling issues, but a lot of those were addressed rather quickly and that’s due to the technology we’ve developed to hot-fix our servers and almost anything in the game without down-time.”
For the 2nd week of BFA, M+, Raids, and Rated PvP are still not open so there isn’t that much that you have to do. Do your Island Expos to level up your Heart of Azeroth, do WQs for rewards, do Warfronts and the 11 weekly quest turn ins, and run your Mythic Dungeons again to try to get the most gear before reset. I personally will be spending a lot of Week 2 farming mats for consumables for M+ and Raids but whatever you choose to do is up to you.
Stormheim is the zone you want to start it. For some reason Legion treasures are not worth any experience like they are in WoD...except in Stormheim. I haven't been able to find out any reason for this, and it's possible it may get fixed/nerfed at a later date. But for the time being you REALLY want to jump from treasure to treasure to augment your quest experience.
Auto looting a mob will increase leveling speed for the expansion. to enable it = Esc, Interface, Controls, Enable Auto Loot. I'm including this because sometimes the simple things are missed. I, sadly, went 3/4 of the way through WoD not knowing that hitting the space bar for my mission tables is much MUCH faster than waiting it out. (i never claimed to be smart OKAY) =P
Edit 20 It’s been a week since this post and a lot of people are still reaching out to me with questions which is fine. I have had a few different people reach out to me to help make YouTube videos based off this guide and more info in BFA which I’m more than willing to do. Whoever gets the videos up first I will link them here for you guys to enjoy.