Yo zos, costume dying has been a big thing since there were costumes. It's a huge community big deal we are excited about. I know many of us will be getting eso+ (myself included) and this is a fantastic addition to the crown store. I had a thought tho, what if tou added out of date color packs (the ones you discontinue) to the rare drops in chests.
I do think it should be a crown store purchase, this is exactlt the kind of thing the CS was intended for. Esp for the new color packs. I do think it'd be a good way to breath new life into old content though. Atm chests are so underwhelming only very new players bother with them. If there was a chance,, even a slim one so many people would find chests to be the next big thing. It would appeal to everyone as well. from folks that run dungeons amd skip by the chests to the casual role players adventuring through campaigne areas.
It's just a thought, but I think it'd be a new way to create some added hype to an overlooked feature.