My anachronistic German light cruiser Koenigsberg design

I was inspired by seeing a movie with a raiding German light cruiser with what appeared to be 12-4.1in guns. The movie was set in WWII, but I thought that I would try a German WWI light cruiser along those lines. I made a drawing, circa 1988, of such a ship. This is the Springsharp design for my Koenigsberg design:

Ger-CL Koeningsberg, Germany Light Cruiser laid down 1912

Displacement:
 3,169 t light; 3,296 t standard; 3,700 t normal; 4,023 t full load

Dimensions: Length overall / water x beam x draught
 378.70 ft / 376.00 ft x 43.00 ft x 17.00 ft (normal load)
 115.43 m / 114.60 m x 13.11 m  x 5.18 m

Armament:
      12 - 4.13" / 105 mm guns (4x3 guns), 35.32lbs / 16.02kg shells, 1912 Model
   Quick firing guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 2.05" / 52.0 mm guns (4x2 guns), 4.29lbs / 1.95kg shells, 1912 Model
   Breech loading guns in deck mounts with hoists
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 458 lbs / 208 kg
 Shells per gun, main battery: 200
 2 - 17.7" / 450 mm submerged torpedo tubes

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

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 2 shafts, 27,928 shp / 20,834 Kw = 27.00 kts
 Range 4,500nm at 12.00 kts
 Bunker at max displacement = 728 tons (100% coal)

Complement:
 236 - 308

Cost:
 £0.331 million / $1.322 million

Distribution of weights at normal displacement:
 Armament: 57 tons, 1.5 %
 Armour: 533 tons, 14.4 %
    - Belts: 0 tons, 0.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 124 tons, 3.4 %
    - Armour Deck: 388 tons, 10.5 %
    - Conning Tower: 21 tons, 0.6 %
 Machinery: 1,225 tons, 33.1 %
 Hull, fittings & equipment: 1,354 tons, 36.6 %
 Fuel, ammunition & stores: 531 tons, 14.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   2,781 lbs / 1,261 Kg = 78.7 x 4.1 " / 105 mm shells or 0.7 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 1.8 ft / 0.5 m
 Roll period: 13.5 seconds
 Steadiness - As gun platform (Average = 50 %): 63 %
   - Recoil effect (Restricted arc if above 1.00): 0.39
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.471
 Length to Beam Ratio: 8.74 : 1
 'Natural speed' for length: 19.39 kts
 Power going to wave formation at top speed: 60 %
 Trim (Max stability = 0, Max steadiness = 100): 57
 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:  20.00 ft / 6.10 m
    - Forecastle (20 %): 15.00 ft / 4.57 m
    - Mid (50 %):  15.00 ft / 4.57 m
    - Quarterdeck (15 %): 15.00 ft / 4.57 m
    - Stern:  16.00 ft / 4.88 m
    - Average freeboard: 15.48 ft / 4.72 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 125.3 %
  - Above water (accommodation/working, high = better): 127.1 %
 Waterplane Area: 10,499 Square feet or 975 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 73 lbs/sq ft or 356 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.15
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent