Why does this look so good? The Ger/BB/1906 design

The flush-decked, imaginery German battleship Ger/BB/1906 is still one of my favorite designs. I just tried the ship in Springsharp and I was surprised how good the ship is:

Ger/BB/1906, Germany Battleship laid down 1906

Displacement:
 17,273 t light; 18,095 t standard; 18,186 t normal; 18,258 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (489.00 ft / 489.00 ft) x 89.00 ft x (25.00 / 25.08 ft)
 (149.05 m / 149.05 m) x 27.13 m  x (7.62 / 7.64 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1906 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1906 Model
   12 x Single mounts on sides, evenly spread
      Weight of broadside 8,278 lbs / 3,755 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
 Ends: 5.00" / 127 mm 164.00 ft / 49.99 m 12.00 ft / 3.66 m
 Upper: 8.00" / 203 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.50" / 38 mm 320.00 ft / 97.54 m 25.00 ft / 7.62 m
 Beam between torpedo bulkheads 59.00 ft / 17.98 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  12.0" / 305 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 3.00" / 76 mm
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 27,560 shp / 20,560 Kw = 21.00 kts
 Range 0nm at 15.00 kts
 Bunker at max displacement = 164 tons (100% coal)

Complement:
 782 - 1,017

Cost:
 £1.593 million / $6.370 million

Distribution of weights at normal displacement:
 Armament: 1,462 tons, 8.0 %
    - Guns: 1,462 tons, 8.0 %
 Armour: 7,192 tons, 39.5 %
    - Belts: 2,678 tons, 14.7 %
    - Torpedo bulkhead: 444 tons, 2.4 %
    - Armament: 2,173 tons, 11.9 %
    - Armour Deck: 1,600 tons, 8.8 %
    - Conning Towers: 298 tons, 1.6 %
 Machinery: 1,969 tons, 10.8 %
 Hull, fittings & equipment: 6,651 tons, 36.6 %
 Fuel, ammunition & stores: 912 tons, 5.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   27,378 lbs / 12,418 Kg = 31.7 x 12.0 " / 305 mm shells or 4.8 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 5.5 ft / 1.7 m
 Roll period: 16.0 seconds
 Steadiness - As gun platform (Average = 50 %): 71 %
   - Recoil effect (Restricted arc if above 1.00): 0.63
 Seaboat quality  (Average = 1.00): 1.43

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.585 / 0.585
 Length to Beam Ratio: 5.49 : 1
 'Natural speed' for length: 22.11 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  20.00 ft / 6.10 m
    - Aft deck: 25.00 %,  20.00 ft / 6.10 m,  19.00 ft / 5.79 m
    - Quarter deck: 20.00 %,  19.00 ft / 5.79 m,  18.50 ft / 5.64 m
    - Average freeboard:  20.73 ft / 6.32 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 107.3 %
  - Above water (accommodation/working, high = better): 155.3 %
 Waterplane Area: 31,387 Square feet or 2,916 Square metres
 Displacement factor (Displacement / loading): 102 %
 Structure weight / hull surface area: 166 lbs/sq ft or 812 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.00
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily