Yahagi, the JPN Premium T5 Light Cruiser. It fits a unique role of torpedo cruiser.
BUT, in the torpedo cruiser role - it well...fails. Even with her unique ability to fire torpedoes beyond her surface detectability range.
Its weak hull, weak armour, floaty shells, and poor torpedo angles are manageable.
The problem is her ability as a torpedo cruiser. Her torpedo reload is a ludicrous 120 seconds (before captain skills). Thus her ability to function in its primary role is already compromised.
The simplest solution would be trading the Speed Booster consumable for the Torpedo Reload Booster consumable.
The change would not make the Yahagi overpowered as her torpedoes already have a higher detection range, and she has the aforementioned weaknesses. While she could try to do a more close in torpedo run like destroyers, her poor torpedo angles would make that situational and in many cases suicidal to execute.