There are several issues i have with this:

The first is just the basis of bringing up the Battleship class. As far as I am aware Zaify doesn't plan to bring the Battleship into CCNet in the near future, suggestions based off of that should be left to the naval channels, not on the actual suggestions page.

Second issue is this weird decision to rename things. There's not really a point, there were just as many dreadnoughts using 12 and 14 as 13 and 15. Furthermore there is absolutely no point in having a bigger gun for dreadnoughts. As it stands 12 inch guns on Dreadnought tends to be rarely used. I don't see how that won't happen. Either the 14 inch gun will be used less (which means 12 inch guns will be used never) or 15 inch guns will take too long to reload and wont be used. There's no point in having a 15 inch gun, it would most likely fall out of common use like the 12 inch on the dreadnought. 12,14 and 16 inch guns are fine.

Another issue is the idea that Battleship v Dreadnought should be a fair fight, it shouldn't. Battleships should be over overwhelmingly powerful in terms of firepower. This is a ship with a 15k block limit, its huge. This "Super Dreadnought" should be more powerful than a regular dread.

I'd like to say personally I don't think the Battleship is a good addition to CCNet and part of that is balancing. Either the ship will immediately make dreadnoughts into 2nd class battleships, or it will be so slow in terms of speed, reload time and rotation that the craft would be next to useless as smaller ships do circles around it. If it's the former then ships like Cruisers would be even less used, as they would be even more outgunned(with the duties of a cruiser being placed on Dreads and Destroyers) and if its the ladder then the ships would maybe be used to bombard a coastline but largely sit in port for show.

The last issue is the idea of the Battlecruiser. Not going to say it much here, mostly because I responded at length the the suggestion you tagged, if you want to see my reasoning you can find it there. But to put it short- no.