[2022] St. Vincent and KoTS

Both the Schlieffen and the St. Vincent battleship lines have had reduced tankiness in favor of increased offense. Schlieffen was used in some competitive matchups, but her need to be close/mid-range while not having the tankiness is a real hindrence in coordinated play. St. Vincent having overmatch, consistent range threat, and a heal that can be managed skillfully means she's a remarkably capable package throughout the battle.

A lot of competitive involves picking hyper-optimized choices. The tool that does the very specific job/role you need it for to the highest extent possible is often chosen. The skill of the player is used to mitigate the downsides to the playstyle while being able to make solid use of the strengths.

There are ships which are best classed as Generalist. "Jack-of-all-Trade" sort of combination. These types do sometimes get picked because of their versatility, but hyper-optimization tends to be the norm.