Hello!
As many players noticed, Transmogs that were previously applied to gear were removed in the 12.0.0 update. This was intentional as a part of the transition from a gear-based to a slot-based system.
Although previously saved loadouts were converted to Custom Sets in the new system, it costs the normal amount of gold to apply the first Transmog to your character, even if you’re simply setting your appearance back to the way it was before. This was an oversight on our part; you should have been able to maintain or reset your existing look without cost.
With the 12.0.1 update before the launch of Midnight, all player-characters will be granted one free Transmog. This will be automatically applied to the next outfit created for each character. We apologize for any inconvenience caused by first-time Transmog costs.
We’re also aware that Legion Artifact appearances can currently only be applied to weapons with compatible weapon categories. We’re working to implement the Legion Artifact override options for the updated Transmog system. You can expect to be able to apply Legion Artifact appearances to more weapon types in the 12.0.1 update.
As always, we’re thankful for your feedback!