Hello Err404....
I also recently upgraded top the Furutaka and have similar issues. Gun range, and Hull B modules.
Yes found myself in some tier7 matchups, so better opposition.
I'm my own worst enemy, in going out early looking for trouble! As Jingles says "never under estimate the value of team work, it gives the opposition other people to shoot at"
Don't side on, citadel easy, most of my deaths have been like devastating strikes.
The hull turns much faster than the guns; have commanders skills rototation, so evade and fire can be tricky. Half rudder.
I'm sticking with it, see how hull C goes.