Thank you to everyone whose put in their thoughts on this. In reading over it all, a few points are brought up repeatedly.
The USS Black was hard to obtain and has few battles played. She's likely only strong because of the players that went through the process of attaining her.
Concern over nerfing Premium/Steel ships.
Re-releasing her for Steel and leaving her as she was.
Black was offered as a Steel ship, but wasn't seeing enough interest from the playerbase with that hard-to-obtain currency. Ships are made to be played and sailed~
When the decision was made to move some of the lesser valued Steel ships to Coal, each ship was reviewed. Coal is a much more readily available resource, so more players will be expected to attain the ships. Black was found to be overperforming even in the hands of average skilled players and needs to be adjusted. Choices made for the health of the game are always the most important.
While it can be frustrating to hear about nerfs which will be happening in the future, it's important to keep ships available and our game in a good state. Other Steel ships like Stalingrad and FDR have received balance changes because game health is paramount.
As to replacing her as a Steel ship, she would simply be returning to a situation where she was undervalued. As well, balance changes are still important and would still need to be undertaken, which would simply compound the previous situation.
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A few things to note!
As of now, there have been no changes announced. For those that have her, she's the same as she's been for years... go out and enjoy her.
When changes are announced, they should be in small adjustments just like we've done when balancing other ships. These adjustments will allow her to seat more comfortably in the Tier and amongst her peers, which makes the game healthier for everyone.