After previously changing the Dragonflight XP tables to have a more conservative nerf to XP, Blizzard has changed them again to a more radical nerf from experience required, very similar to the one first datamined, resulting in almost 60% reduction of total experience required from 1-60.
Dragonflight Experience Changes in Build 45480
Below you can see the experience changes in this build compared to Shadowlands’ live value.