I didn't really realise that the floatplane needed a hanger, which was very stupid of me. I'll remove the floatplane, because even though I haven't actually mentioned it anywhere in the lore, battleships and heavy cruisers were built without catapults to save space. Instead scout craft and designated spotting planes were launched by dedicated floatplane carriers and aircraft carriers. Antara built many small aircraft carriers before WW2 for this reason. I realise I should probably write a bit more history for my ships, at least what's relevant to the drawing.
OK, that sounds internally consistent, which is the main thing. Others better versed than I with the IRL naval history of this period can debate the doctrinal decision, but that's neither here nor there.
If, as you mentioned re. Krakatoa's comment, you want to shorten the hull, you might look towards moving your superstructure aft, and a later upgrade may also add AA pieces on the fantail like on the Yamato.
I'll also make some adjustments to the lifeboats and the crane, I drew the original drawings weeks before the refit and made adjustments which I didn't carry over to the original.
OK, but IMO you'd better start with removing the casemate guns and reworking the main deck, then you can re-arrange the boats and secondary battery to your liking.
In regards to the gun directors, I was looking at the Iowa drawing, which had two directors in the front and two at the back, as well as one on each side for the 5" guns I think. The two directors on each side of my ship are to control both sets of 5" guns.
OK, I see what you mean. I was in no doubt on the secondary battery directors. Thing is, on the Iowa, the extra directors fore and aft are of a different type, if I'm not mistaken. The latest IJN and USN parts sheets show a lot of alternative stereo and radar fire-control assemblies, some dedicated to main battery control. Then again, I can't presume to know the detail of your AU technical timeline, so the types of directors you use is entirely up to you.
With regards to the hull, I literally copied the entire bottom hull of one of Garlicdesigns US battleships, but I'll try and correct the errors you pointed out.
Beyond looking strange, I can't confirm that this is wrong. Some US BBs in the archive do show something similar below the stabilizer strakes, though they don't look exactly the same. Maybe GD or other designers of these ships can shed light on the actual shape or purpose of these shapes.
Fingers crossed for your exams!