Surigao Strait says that the Fusous are sunk versus a 14" Standard like Pennsylvania. As for the Kongous, Kirishima's demise points out that speed is not everything.
Surigao strait says
nothing about ship quality.
Surigao only confirmed Stalin's statement that "quantity has a quality of its own".
Also, IIRC, Pennsylvania specifically didn't fire a single shot in Surigao. It's commented in BelaBatt that one of the reasons Pennssylvania is such a bitter bitch is precisely that she could not even fire in that battle, not land a hit, but even open fire. The 16 inch equipped Standards took all the fun in that battle.
...yes, a single battleship does not fare well versus six. Six modernized, radar-equipped battleships, no less. In a battle that plays precisely to their strengths and none of Yamashiro's.
This really does not say anything about the quality of the Fusous vs. the standards.
Yeah. People tend to forget the odds for both sides in Surigao strait.
Japan side: 2 battleships, 1 heavy cruiser, and four destroyers. That's the Nishimura fleet. Which was later joined by the Shima fleet, which added two more heavy cruisers, one light cruiser, and four additional destroyers. And that's it.
US side: 6 battleships, 10 heavy cruisers, and several DesRons worth of destroyers, plus air support and land support.
And let's not forget that while the Nishimura and Shima fleets were advancing through a strait, which limits the mobility of a fleet, the US forces were comfortably deployed at the exit point with plenty of space to do so.
That's not an engagement, no matter how you look at it: it's a curbstomping waiting to happen. And it actually is what happened.
In any other Navy not the IJN, the Fusous would have been very welcome on their own merits, because they were pretty decent battleships; not awesome, but capable of doing any job that required a BB. In the IJN, though, they commited the unforgivable sin of not living up to the expectations of IJN High Command, and were deemed obsolete (which actually is the fate of any piece of tech) and relegated to secondary positions until they were used as sacrificial pawns in the Leyte campaign.