The Shadowlands redesign of Heirloom gear, which removed XP bonuses, has made Heirlooms a lot less apealing.
Folks, let's talk about heirlooms.
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.
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?