I think it would be really nice to make this reputation something you can earn from celestial dungeons as it only makes sense that when you’re helping/getting the help of celestials that you can earn reputation with them when it’s also one of the more heavily gated reputation. Other reputations can be earned really quick on alts as you can get revered (or close) by questing for the shadopan or klaxxi and you can turn boa rep tokens from keys for golden lotus but august celestial don’t really offer anything like that.
Adding a boa rep token for august celestial to the august stone fragments vendor would be my first idea but could also be an end of dungeon reward.