My 1933 Italian light cruiser design

My 1933 Italian light cruiser design is better-protected than the real ships. Mine has a 2in deck, for one thing, and a 1in torpedo bulkhead. The main belt is 4in thick, although it is just 12ft high, just protecting the waterline. I increased the speed to 36 knots, so the ship is huge, at 11,306 tons Standard. The armament is unchanged from my 1931 design. This is the Springsharp report:

It/CL/1933, Italy Light Cruiser laid down 1933 (Engine 1945)

Displacement:
 10,986 t light; 11,306 t standard; 11,900 t normal; 12,375 t full load

Dimensions: Length overall / water x beam x draught
 624.05 ft / 618.00 ft x 59.00 ft x 21.00 ft (normal load)
 190.21 m / 188.37 m x 17.98 m  x 6.40 m

Armament:
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1933 Model
   Quick firing guns in turrets (on barbettes)
   on centreline, all forward, 2 raised mounts - superfiring
      8 - 4.00" / 102 mm guns (4x2 guns), 32.00lbs / 14.51kg shells, 1933 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, all aft
      16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, all raised mounts
 Weight of broadside 1,145 lbs / 519 kg
 Shells per gun, main battery: 120
 8 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 445.00 ft / 135.64 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 111 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 445.00 ft / 135.64 m 21.00 ft / 6.40 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.50" / 89 mm 2.50" / 64 mm  3.00" / 76 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 151,801 shp / 113,243 Kw = 36.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 1,070 tons

Complement:
 569 - 740

Cost:
 £4.923 million / $19.691 million

Distribution of weights at normal displacement:
 Armament: 143 tons, 1.2 %
 Armour: 2,505 tons, 21.0 %
    - Belts: 874 tons, 7.3 %
    - Torpedo bulkhead: 346 tons, 2.9 %
    - Armament: 304 tons, 2.6 %
    - Armour Deck: 936 tons, 7.9 %
    - Conning Tower: 45 tons, 0.4 %
 Machinery: 3,833 tons, 32.2 %
 Hull, fittings & equipment: 4,505 tons, 37.9 %
 Fuel, ammunition & stores: 914 tons, 7.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   11,624 lbs / 5,273 Kg = 107.6 x 6.0 " / 152 mm shells or 1.6 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 3.2 ft / 1.0 m
 Roll period: 13.9 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.32
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.544
 Length to Beam Ratio: 10.47 : 1
 'Natural speed' for length: 24.86 kts
 Power going to wave formation at top speed: 62 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  29.00 ft / 8.84 m
    - Forecastle (20 %): 28.00 ft / 8.53 m
    - Mid (33 %):  28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 22.72 ft / 6.93 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 172.2 %
  - Above water (accommodation/working, high = better): 155.3 %
 Waterplane Area: 25,303 Square feet or 2,351 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 101 lbs/sq ft or 494 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.68
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent