My simplified design for a G3 battlecruiser

This is my simplified design for a G3 battlecruiser. The Springsharp design is quite unsatisfactory:

GB/CB/1921 G3, Great Britain Battlecruiser laid down 1921 (Engine 1933)

Displacement:
 47,006 t light; 49,780 t standard; 52,345 t normal; 54,398 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (864.01 ft / 855.00 ft) x 106.00 ft x (32.50 / 33.54 ft)
 (263.35 m / 260.60 m) x 32.31 m  x (9.91 / 10.22 m)

Armament:
      9 - 16.00" / 406 mm 45.0 cal guns - 2,065.00lbs / 936.67kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1921 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
   1 x Triple mount on sides, forward deck aft
      16 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1921 Model
   2 x Twin mounts on sides, forward deck forward
   6 x Twin mounts on sides, aft evenly spread
      6 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts, 1921 Model
   6 x Single mounts on sides, aft deck aft
      40 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   4 x 2 row quad mounts on sides, forward deck forward
  4 raised mounts
   6 x 2 row quad mounts on sides, aft deck forward
  6 raised mounts
      Weight of broadside 20,721 lbs / 9,399 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 570.00 ft / 173.74 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 11.0" / 279 mm   0.00 ft / 0.00 m 8.00 ft / 2.44 m
   Main Belt covers 103 % of normal length
   Main belt does not fully cover magazines and engineering spaces
   Main Belt inclined 17.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  4.00" / 102 mm 570.00 ft / 173.74 m 32.50 ft / 9.91 m
 Beam between torpedo bulkheads 66.00 ft / 20.12 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 10.0" / 254 mm  14.0" / 356 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 5.00" / 127 mm
 Forecastle: 5.00" / 127 mm  Quarter deck: 6.00" / 152 mm

   - Conning towers: Forward 14.00" / 356 mm, Aft 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 204,488 shp / 152,548 Kw = 32.00 kts
 Range 6,000nm at 16.00 kts
 Bunker at max displacement = 4,618 tons

Complement:
 1,729 - 2,249

Cost:
 £11.230 million / $44.918 million

Distribution of weights at normal displacement:
 Armament: 3,517 tons, 6.7 %
    - Guns: 3,517 tons, 6.7 %
 Armour: 17,820 tons, 34.0 %
    - Belts: 3,047 tons, 5.8 %
    - Torpedo bulkhead: 2,742 tons, 5.2 %
    - Armament: 4,772 tons, 9.1 %
    - Armour Deck: 6,597 tons, 12.6 %
    - Conning Towers: 663 tons, 1.3 %
 Machinery: 5,958 tons, 11.4 %
 Hull, fittings & equipment: 19,711 tons, 37.7 %
 Fuel, ammunition & stores: 5,339 tons, 10.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   76,365 lbs / 34,638 Kg = 37.3 x 16.0 " / 406 mm shells or 12.2 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 6.4 ft / 2.0 m
 Roll period: 17.6 seconds
 Steadiness - As gun platform (Average = 50 %): 58 %
   - Recoil effect (Restricted arc if above 1.00): 0.83
 Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and small transom stern
 Block coefficient (normal/deep): 0.622 / 0.626
 Length to Beam Ratio: 8.07 : 1
 'Natural speed' for length: 31.44 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  33.00 ft / 10.06 m,  29.00 ft / 8.84 m
    - Forward deck: 30.00 %,  29.00 ft / 8.84 m,  26.00 ft / 7.92 m
    - Aft deck: 30.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Quarter deck: 15.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Average freeboard:  27.60 ft / 8.41 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 115.4 %
  - Above water (accommodation/working, high = better): 204.5 %
 Waterplane Area: 69,391 Square feet or 6,447 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 213 lbs/sq ft or 1,039 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.32
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room