Let's see here -whips out notes-
Rare is planning to re-release some of the free season cosmetics but they're not sure how they want to do it, and if they already know how, we don't know when they will do it.
Barrel Disguise is not an overpowered emote, it's bigger than most of the barrels in the game, does not mimic the colors of the ones on FoTD or the Devil's Roar, is insanely impractical for most of its uses for anyone with relatively good game sense (e.g. the emote doesn't sway with the ship and is slightly bigger than most of the barrels on all of the ships | if used on an island people are bound to see your mermaid/you get attacked by the island's enemies)
Any steals or successful plays involving this emote are on the fault of an inexperienced player that got outplayed by it, the hide emote is for free, still available, and still usable for hiding against even some of the more aware-but-inexperienced players in the game.
Please, stop going in circles about this, if you got outplayed by an emote that is literally an oversized barrel you have no one to blame but yourself or your crew for not checking for things, being able to tell the difference between a barrel that is on your boat, or defeating the pirate that attacked you.