Just did a timewalking dungeon (Everbloom) the trash mobs gave a whopping 335XP each. That’s with the 30% buff from Master of the Timeways and 25% from my Warband. Even WITH dungeon completion, I didn’t even get a level.
This is SHAMEFUL!!!
Why even give XP buffs if you’re gonna remove the XP from stuff?
I think that’s more a sign that the XP Vanilla mobs give is a bit wonky when scaled. Which isn’t a huge surprise when you remember that a lot of Vanilla dungeons have you pulling and killing like, 5 times more enemies than anything from Cata onwards.
You’re not going to get a full level per dungeon once you get to a high level, as well as you probably had a high level character in your group, which will reduce exp gains.