WoW Heirlooms still don’t provide bonus XP, but they now have higher ilevels and better scaling
The Shadowlands redesign of Heirloom gear, which removed XP bonuses, has made Heirlooms a lot less apealing.
Battle-Hardened Heirloom upgrades boost heirlooms to 120 in Patch 8.1.5, but they aren’t cheap
Folks, let's talk about heirlooms.
WoW’s heirlooms receive an item level update
If you've been leveling with upgraded heirlooms to speed the race from level 90 to level 100, you may have noticed that their item level isn't impressive when compared to the gear you could pick up by running at-level dungeons.
How to collect heirlooms in World of Warcraft
On the long road from level 1 to level 100, heirlooms can speed up the process significantly... and help you spend less time hunting for gear and more time playing the game. Who wouldn't want that?