Mutsu blew up without being hit once. Kirishima didn't last long once the hits started landing although those were 16" superheavies. Yamashiro was apparently still firing and under at least some control for a significant period of time after the first shell landed. Hiei on the other hand was suffering from a single 8" hit although numerous other light hits didn't make things easy for her. I've yet to see anything that suggest that the IJN considered those reconstructed ships obsolete after Midway it's just that they needed carriers. Indeed up to that point what battleship had been sunk at sea by opposing aircraft while it had a CAP and a reasonable escort? Indeed which ones were even hit under those circumstances (I can think of at least one but it didn't take serious damage)?