A British first class cruiser for 1914: GB/CL/1914 with 7.5in guns

I thought that a substantial British cruiser for use on the high seas would be useful to back up the smaller 6in gun cruisers. My design for the GB/CL/1914 has 8-7.5in BLR, 8-4.7in QF, 4-21in TT, and a 4in armor basis. The speed is 30 knots maximum with a 15 knot cruising speed. The range is modest, but adequate 7,500 nm. This is the Springsharp report:

GB/CL/1914, Great Britain Cruiser laid down 1914 (Engine 1921)

Displacement:
 9,476 t light; 9,879 t standard; 11,004 t normal; 11,904 t full load

Dimensions: Length overall / water x beam x draught
 582.98 ft / 580.00 ft x 60.00 ft x 21.00 ft (normal load)
 177.69 m / 176.78 m x 18.29 m  x 6.40 m

Armament:
      8 - 7.50" / 191 mm guns in single mounts, 210.94lbs / 95.68kg shells, 1914 Model
   Breech loading guns in deck mounts with hoists
   on centreline ends, evenly spread, all raised mounts - superfiring
      8 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1914 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 2,103 lbs / 954 kg
 Shells per gun, main battery: 150
 4 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 400.00 ft / 121.92 m 17.00 ft / 5.18 m
 Ends: 3.00" / 76 mm 100.00 ft / 30.48 m 17.00 ft / 5.18 m
   80.00 ft / 24.38 m Unarmoured ends
   Main Belt covers 106 % of normal length

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm       -         -
 2nd: 1.00" / 25 mm       -         -

   - Armour deck: 2.00" / 51 mm, Conning tower: 5.00" / 127 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 70,767 shp / 52,792 Kw = 30.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 2,024 tons

Complement:
 536 - 698

Cost:
 £1.137 million / $4.549 million

Distribution of weights at normal displacement:
 Armament: 263 tons, 2.4 %
 Armour: 2,342 tons, 21.3 %
    - Belts: 1,315 tons, 12.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 94 tons, 0.9 %
    - Armour Deck: 880 tons, 8.0 %
    - Conning Tower: 53 tons, 0.5 %
 Machinery: 2,437 tons, 22.1 %
 Hull, fittings & equipment: 4,435 tons, 40.3 %
 Fuel, ammunition & stores: 1,527 tons, 13.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   15,928 lbs / 7,225 Kg = 75.5 x 7.5 " / 191 mm shells or 1.8 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 3.0 ft / 0.9 m
 Roll period: 14.7 seconds
 Steadiness - As gun platform (Average = 50 %): 78 %
   - Recoil effect (Restricted arc if above 1.00): 0.93
 Seaboat quality  (Average = 1.00): 1.57

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.527
 Length to Beam Ratio: 9.67 : 1
 'Natural speed' for length: 24.08 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  28.00 ft / 8.53 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (67 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 23.52 ft / 7.17 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 90.8 %
  - Above water (accommodation/working, high = better): 185.0 %
 Waterplane Area: 23,770 Square feet or 2,208 Square metres
 Displacement factor (Displacement / loading): 118 %
 Structure weight / hull surface area: 105 lbs/sq ft or 511 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.10
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather