Classic dungeons should be the default for queued leveling, BFA barely made sense going into shadowlands cause you don’t unlock most of the war campaign til 50, BFA and SL both have little to do with Dragonflight outside of a couple ardenweald quests and like 1 dragon quest in kultiras.
Having people just level in a more directed way through the classic zones, with a dragon bias and presenting it as a chromie flashback to catch us up would make more sense and give new players easier dungeons to start off with…
before the cata ones poor tuning pounds them into the dirt.