The Ger/CL1914 light cruiser design

I had decided to build some more conventional light cruisers for the Germans in our war game. These look pretty "German", with three funnels and a short forecastle. Three 5in guns are mounted on the centerline, with one at the rear in superfiring position. Two are on the sides at the rear of the forecastle and four more are on the sides. One pair is between the second and third funnels and the last pair is just forward of the rear superstructure. The ships were designed to carry forty mines on rails. They also have 4-21in TT in single, rotating tubes on the sides. This is the Springsharp report:

Ger/CL/1914, Germany Light Cruiser laid down 1914 (Engine 1927)

Displacement:
 3,006 t light; 3,125 t standard; 3,499 t normal; 3,798 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (434.51 ft / 430.00 ft) x 40.00 ft x (16.00 / 16.96 ft)
 (132.44 m / 131.06 m) x 12.19 m  x (4.88 / 5.17 m)

Armament:
      9 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   3 x Single mounts on centreline ends, majority aft
  1 raised mount aft - superfiring
   6 x Single mounts on sides, evenly spread
      Weight of broadside 585 lbs / 265 kg
      4 - 21.0" / 533 mm, 21.00 ft / 6.40 m torpedoes - 1.338 t each, 5.352 t total
 In 4 sets of deck mounted side rotating tubes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Ends: Unarmoured

   - Torpedo Bulkhead:
  0.50" / 13 mm 300.00 ft / 91.44 m 16.00 ft / 4.88 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Protected deck - single deck: 1.00" / 25 mm For and Aft decks

   - Conning towers: Forward 4.00" / 102 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 48,853 shp / 36,444 Kw = 32.00 kts
 Range 4,500nm at 16.00 kts
 Bunker at max displacement = 673 tons

Complement:
 226 - 295

Cost:
 £0.474 million / $1.897 million

Distribution of weights at normal displacement:
 Armament: 184 tons, 5.2 %
    - Guns: 178 tons, 5.1 %
    - Torpedoes: 5 tons, 0.2 %
 Armour: 474 tons, 13.6 %
    - Torpedo bulkhead: 89 tons, 2.5 %
    - Armament: 197 tons, 5.6 %
    - Armour Deck: 169 tons, 4.8 %
    - Conning Tower: 20 tons, 0.6 %
 Machinery: 1,460 tons, 41.7 %
 Hull, fittings & equipment: 854 tons, 24.4 %
 Fuel, ammunition & stores: 493 tons, 14.1 %
 Miscellaneous weights: 40 tons, 1.1 %
    - On freeboard deck: 40 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   1,140 lbs / 517 Kg = 18.2 x 5.0 " / 127 mm shells or 0.5 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 1.5 ft / 0.5 m
 Roll period: 13.6 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.57
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.445 / 0.456
 Length to Beam Ratio: 10.75 : 1
 'Natural speed' for length: 20.74 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 8.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 18.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Forward deck: 14.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 53.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  16.78 ft / 5.11 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 302.7 %
  - Above water (accommodation/working, high = better): 139.5 %
 Waterplane Area: 10,927 Square feet or 1,015 Square metres
 Displacement factor (Displacement / loading): 83 %
 Structure weight / hull surface area: 44 lbs/sq ft or 216 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.55
  - Longitudinal: 1.14
  - Overall: 0.59
 Hull space for machinery, storage, compartmentation is extremely poor
 Room for accommodation and workspaces is excellent