Blizzard has implemented a new Battle for Azeroth 8.0.1 hotfix speeds up WoW leveling between levels 40 and 100.
Mythic+ Leveling - A Patch 8.0 Azeroth Progressive Leveling Rework Proposal
MMO Servers - Free MMORPG and MMO Games - Best Gaming Forum
All Battle for Azeroth Cinematics WoW BfA Patch 8.0 - 8.3
FASTEST LEVELING FROM 110-120 in Patch 8.1.5 - Level Alts FAST!
Patch 8.0.1 Live This Week! - MMO-Champion
INSANE 1-120 SPEEDS BfA Patch 8.1 Leveling Guide: The Fastest Yet?
Battle for Azeroth Summer Sale - $20 for Level 110 Character Boost, $10 for Collector's Edition Mounts - Wowhead News
Blizzard didn't intend to make leveling slower in patch 8.0 but it is
Patch 8.1.5 Battle for Azeroth WoW Content Overview - Wowhead
Patch 8.1.5 Battle for Azeroth WoW Content Overview - Wowhead
WoW: Battle for Azeroth Patch 8.1 Tides of Vengeance Patch Notes Released; Performance DX12 Optimizations
BfA Leveling Guide 110-120 (Zones, Reputation Gear and more!)
FASTEST WAYS TO LEVEL In Patch 8.1
Blizzard didn't intend to make leveling slower in patch 8.0 but it is