warbank for me says in use by another player? yes i completed the questline
logged a level 1, all my tanaan ilvl-44 gear is still 44 and useable (also on 10)
logged a 10 (main/vet account) was able to DF showing 4 dots of vigor, unable to switch flying to regular says "spell unknown", went to a flying trainer in ORG, unable to talk to the trainer. took 10 to slagmines, ooze still works. blizzard auto switched me out of BFA time, i was in DF time when testing
logged a 20 (main/vet account) able to fly both ways and switch with no issues, wow gear is 84 blue/89 epic, mechagon rings 70. my blue 84 gear also included BFA rare drops
logged a 27 (former 70) all BC gear was 32-34, a BG satchel ring and trinket was 123