Six Kii battleships instead of two Yamatos

Would six Kii-class ships in place of the Yamatos improve Japan's position, including at Guadalcanal?

The larger force is judged a significant problem for the Allies, with possible Guadalcanal use depending on the scenario.

Six capable Kii hulls would give Japan more fast capital ships to deploy than the two-Yamato alternative. The quoted concept combines ten 16-inch/45 guns, speed approaching thirty knots and a range of roughly 8,000 nautical miles at fourteen knots. Modernisation is expected to improve ships surviving into the later period. Those characteristics support the judgment that the alternative force would create a substantial Allied problem. Employment at Guadalcanal remains possible rather than assured; no particular battle outcome is worked through.