Oh I know this can never be perfect, but it’s a little crazy.
I was very happy when I beat my first T8 delve as a resto druid at ilevel 575.
I was even happier when I beat a T8 as a 560 frost mage.
I just leveled my prot warrior to 80, and immediately jumped into a T8 delve… and pretty easily beat it, at ilevel 532. This seems pretty out-of-whack to me.