The Ger/DM/1914 design study

I have a list of alternate designs, most with with just a small amount of information. This is based on the smallest of the specifications. This is for a 36 knot destroyer minelayer that carries 160 mines on rails. I had hoped for a speed of 40 knots. This is the Springsharp report:

Ger/DM/1914, Germany Destroyer Minelayer laid down 1914 (Engine 1950)

Displacement:
 1,875 t light; 1,929 t standard; 2,150 t normal; 2,326 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (362.19 ft / 360.00 ft) x 36.00 ft x (13.50 / 14.23 ft)
 (110.39 m / 109.73 m) x 10.97 m  x (4.11 / 4.34 m)

Armament:
      2 - 5.00" / 127 mm 45.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   2 x Single mounts on centreline ends, evenly spread
      Weight of broadside 130 lbs / 59 kg

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 54,205 shp / 40,437 Kw = 36.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 397 tons

Complement:
 157 - 205

Cost:
 £0.295 million / $1.178 million

Distribution of weights at normal displacement:
 Armament: 34 tons, 1.6 %
 Armour: 30 tons, 1.4 %
    - Armament: 30 tons, 1.4 %
 Machinery: 1,098 tons, 51.1 %
 Hull, fittings & equipment: 574 tons, 26.7 %
 Fuel, ammunition & stores: 274 tons, 12.8 %
 Miscellaneous weights: 138 tons, 6.4 %
    - On freeboard deck: 138 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   613 lbs / 278 Kg = 9.8 x 5.0 " / 127 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 1.5 ft / 0.5 m
 Roll period: 12.1 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.19
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.430 / 0.441
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 21.85 kts
 Power going to wave formation at top speed: 71 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  25.00 ft / 7.62 m,  23.00 ft / 7.01 m
    - Forward deck: 14.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Aft deck: 51.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Quarter deck: 15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  17.88 ft / 5.45 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 170.3 %
  - Above water (accommodation/working, high = better): 171.4 %
 Waterplane Area: 8,450 Square feet or 785 Square metres
 Displacement factor (Displacement / loading): 75 %
 Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 2.73
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent