Bfa started to be good when they made Essences, so EP patch; before that? When you couldn’t unlock your rings? It was terrible.
Corruption was… I wouldn’t say amazing but I liked the stat corruptions, not the ones with effects like random procs with massive damage such as Twilight Devastation.
Dungeons were amazing, way better than most Shadowlands dungeon.
Raids were horrible, Shadowlands raids are more fun in my opinion (except for some fight like KT).
I really miss Bfa dungeons, that alone saved the expansion for me. I would return to Bfa only for M+ (and well… not having to farm Domination socket ranks and pieces).