An "alternate" Ger/CL/1914 design

I have long admired the Russian light cruisers built right before and during the Great War. They seemed to have some German influence. I thought that I would try designing a German ship along those lines, although persisting in using English units for torpedos and guns. I wanted to keep using coal-fired boilers, as that would have been what would have been actually used. This is my Springsharp design:

Ger/CL/1914 Alternate, Germany Light Cruiser laid down 1914 (Engine 1937)

Displacement:
 6,627 t light; 6,853 t standard; 7,494 t normal; 8,007 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (524.10 ft / 518.00 ft) x 53.00 ft x (17.00 / 17.93 ft)
 (159.75 m / 157.89 m) x 16.15 m  x (5.18 / 5.46 m)

Armament:
      12 - 5.10" / 130 mm 50.0 cal guns - 70.00lbs / 31.75kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   2 x Single mounts on centreline ends, evenly spread
   10 x Single mounts on sides, evenly spread
      Weight of broadside 840 lbs / 381 kg
      4 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.397 t each, 5.589 t total
 In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 370.00 ft / 112.78 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 110 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  0.70" / 18 mm 370.00 ft / 112.78 m 16.00 ft / 4.88 m

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

   - Protected deck - single deck: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 5.00" / 127 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Geared drive, 2 shafts, 59,473 shp / 44,367 Kw = 30.00 kts
 Range 5,200nm at 14.00 kts
 Bunker at max displacement = 1,155 tons (100% coal)

Complement:
 402 - 523

Cost:
 £0.732 million / $2.927 million

Distribution of weights at normal displacement:
 Armament: 257 tons, 3.4 %
    - Guns: 252 tons, 3.4 %
    - Torpedoes: 6 tons, 0.1 %
 Armour: 1,822 tons, 24.3 %
    - Belts: 722 tons, 9.6 %
    - Torpedo bulkhead: 153 tons, 2.0 %
    - Armament: 183 tons, 2.4 %
    - Armour Deck: 722 tons, 9.6 %
    - Conning Tower: 41 tons, 0.6 %
 Machinery: 1,813 tons, 24.2 %
 Hull, fittings & equipment: 2,734 tons, 36.5 %
 Fuel, ammunition & stores: 867 tons, 11.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   12,041 lbs / 5,462 Kg = 181.5 x 5.1 " / 130 mm shells or 1.8 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 2.5 ft / 0.8 m
 Roll period: 14.1 seconds
 Steadiness - As gun platform (Average = 50 %): 69 %
   - Recoil effect (Restricted arc if above 1.00): 0.42
 Seaboat quality  (Average = 1.00): 1.38

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.562 / 0.569
 Length to Beam Ratio: 9.77 : 1
 'Natural speed' for length: 22.76 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  24.00 ft / 7.32 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Aft deck: 23.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 27.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  20.92 ft / 6.38 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 144.5 %
  - Above water (accommodation/working, high = better): 206.4 %
 Waterplane Area: 19,377 Square feet or 1,800 Square metres
 Displacement factor (Displacement / loading): 119 %
 Structure weight / hull surface area: 86 lbs/sq ft or 418 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.91
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily