A new GB/CB/1916 Fast battlecruiser concept

I had a concept that has been developing for a few days for a new British fast battlecruiser. As you can see, the photograph is derived from that for the Ger/CB/1912 design. I found that I can run Springsharp 3.0 Beta 3 at my desk, so I developed my initial cut at a design:

GB/CB/1916 Fast, Great Britain Battlecruiser laid down 1916 (Engine 1923)

Displacement:
 42,316 t light; 43,995 t standard; 45,802 t normal; 47,248 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (885.86 ft / 878.00 ft) x 104.00 ft x (33.00 / 33.81 ft)
 (270.01 m / 267.61 m) x 31.70 m  x (10.06 / 10.30 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.21lbs / 1,027.48kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      10 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   10 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 14,591 lbs / 6,618 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 480.00 ft / 146.30 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces
   Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 480.00 ft / 146.30 m 33.00 ft / 10.06 m
 Beam between torpedo bulkheads 74.00 ft / 22.56 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 6.00" / 152 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 2.00" / 51 mm
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 8.00" / 203 mm, Aft 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 383,549 shp / 286,127 Kw = 38.00 kts
 Range 4,800nm at 15.00 kts
 Bunker at max displacement = 3,253 tons

Complement:
 1,565 - 2,035

Cost:
 £7.601 million / $30.406 million

Distribution of weights at normal displacement:
 Armament: 2,467 tons, 5.4 %
    - Guns: 2,467 tons, 5.4 %
 Armour: 7,463 tons, 16.3 %
    - Belts: 1,495 tons, 3.3 %
    - Torpedo bulkhead: 1,172 tons, 2.6 %
    - Armament: 2,075 tons, 4.5 %
    - Armour Deck: 2,334 tons, 5.1 %
    - Conning Towers: 386 tons, 0.8 %
 Machinery: 12,819 tons, 28.0 %
 Hull, fittings & equipment: 19,567 tons, 42.7 %
 Fuel, ammunition & stores: 3,486 tons, 7.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,045 lbs / 18,618 Kg = 18.3 x 16.5 " / 419 mm shells or 4.4 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 7.0 ft / 2.1 m
 Roll period: 16.5 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.75
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.532 / 0.536
 Length to Beam Ratio: 8.44 : 1
 'Natural speed' for length: 29.63 kts
 Power going to wave formation at top speed: 59 %
 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: 20.00 %,  37.00 ft / 11.28 m,  34.00 ft / 10.36 m
    - Forward deck: 30.00 %,  34.00 ft / 10.36 m,  33.00 ft / 10.06 m
    - Aft deck: 22.00 %,  33.00 ft / 10.06 m,  33.00 ft / 10.06 m
    - Quarter deck: 28.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Average freeboard:  31.35 ft / 9.56 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 165.1 %
  - Above water (accommodation/working, high = better): 253.9 %
 Waterplane Area: 62,662 Square feet or 5,822 Square metres
 Displacement factor (Displacement / loading): 99 %
 Structure weight / hull surface area: 212 lbs/sq ft or 1,035 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.64
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room