ORIGINAL: Terminus
As training vessels, probably not. It's just doubtful whether Japan could afford to spend the money on ships of such limited operational capability.
Sorry I'm late to the ball. Oh, well.
I thought the Katoris were developmental ships, that incorporated a bunch of tweaks and twonks that went into the designs of the Mogamis and onwards. Yeah, they sucked, and once they were around, making them training cruisers wasn't a bad idea, but I think their design and construction had a certain degree of utility for follow-on designs, that might not be represented in their operational specifications.
Basically, I would keep them. Japan didn't have a good basis for CA designs, so they needed to do something. The Katori was a good interim test platform. So what do ya do with your test platforms? Maybe make them training cruisers and use them operationally, if necessary? Yeah, I would keep them.
Ciao. John