Giant battleships face more than a Panama lock limit

Would widening the Panama Canal's locks be enough for much larger battleships?

No. The ships would also need enough room to maneuver through the canal, whose strategic importance made compatibility essential.

The Panama Canal constrained both entry through its locks and the room needed to maneuver a very large hull. Enlarging the locks alone would not remove every obstacle. Accommodating larger British ships in the Suez Canal was framed mainly as a dredging problem. Because Panama transit was strategically essential to the United States, canal compatibility limited how far its battleship designs could grow.