A British "super-destroyer" design

I tried a British super-destroyer design with 5.1in guns, as they considered at one point in the 1930's. This design was inspired by the largest Japanese destroyers of similar size, although greater displacement. The length is 440ft and the displacement on the order of 3,000 tons. This is the Springsharp report:

GB/DL/1941, Great Britain Large Destroyer laid down 1941 (Engine 1950)

Displacement:
 2,538 t light; 2,662 t standard; 3,004 t normal; 3,277 t full load

Dimensions: Length overall / water x beam x draught
 440.84 ft / 440.00 ft x 44.00 ft x 15.00 ft (normal load)
 134.37 m / 134.11 m x 13.41 m  x 4.57 m

Armament:
      8 - 5.10" / 130 mm guns (4x2 guns), 66.33lbs / 30.08kg shells, 1941 Model
   Dual purpose guns in deck mounts with hoists
   on centreline ends, evenly spread, all raised mounts - superfiring
      12 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1941 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, all raised mounts
      16 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1941 Model
   Breech loading guns in deck mounts 
   on side, evenly spread, all raised mounts
 Weight of broadside 558 lbs / 253 kg
 Shells per gun, main battery: 200
 10 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 68,837 shp / 51,353 Kw = 36.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 614 tons

Complement:
 202 - 263

Cost:
 £2.202 million / $8.807 million

Distribution of weights at normal displacement:
 Armament: 70 tons, 2.3 %
 Machinery: 1,491 tons, 49.6 %
 Hull, fittings & equipment: 977 tons, 32.5 %
 Fuel, ammunition & stores: 466 tons, 15.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   887 lbs / 402 Kg = 13.4 x 5.1 " / 130 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.45
 Metacentric height 2.8 ft / 0.8 m
 Roll period: 11.1 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.41
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.362
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 20.98 kts
 Power going to wave formation at top speed: 64 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  24.00 ft / 7.32 m
    - Forecastle (20 %): 22.00 ft / 6.71 m
    - Mid (37 %):  22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
    - Quarterdeck (15 %): 14.00 ft / 4.27 m
    - Stern:  14.00 ft / 4.27 m
    - Average freeboard: 17.12 ft / 5.22 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 178.7 %
  - Above water (accommodation/working, high = better): 114.9 %
 Waterplane Area: 11,751 Square feet or 1,092 Square metres
 Displacement factor (Displacement / loading): 78 %
 Structure weight / hull surface area: 46 lbs/sq ft or 225 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.50
  - Longitudinal: 1.55
  - Overall: 0.56
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate