Do stewards need flow-create-board for global renames to be able to rename user's Flow boards? They don't have it currently.
Every time a user who uses Flow on its talk page asks to change its username, the Flow board is not moved.
Last case. I had to be pinged, find someone to delete the destination page and then move the Flow board (when I have enough rights to move Flow pages on the designated wiki). Give the right to bureaucrats to move Flow boards would help.