Most of the Sea battles at Guadalcanal were at night. Battleships were an important part of the battles and the bombardment of Henderson field. At night, the carriers were useless and were withdrawn from the area.
Over the horizon gunnery probably wasnt practical, spotters or not, because the accuracy probably wasnt very good at this range. At the much shorter ranges of the night battles the Yamato and Musashi guns would have been deadly.
There is a bit written about the fuzes on AP shells used by the IJN - delays too long, optimized for subaquatic hits, that saved some CVEs from sinking off Samar, for instance.
Edited by sunday, Today, 02:17 AM.