What I am calling the Ger/BB/1910 design has 15-11in guns

The design that I have labelled Ger/BB/1910 has an armament of 15-1in guns in triple turrets. The ship looks very German for the pre-WWI period, although the armament layout is rather Italian-like. The ship looks something like the Koenig. I think that it was inspired by the Italian battlehips with 13-12in guns. The design actually works quite well, if you can live with 11in guns on a ship built this late. This is a case of sacrificing gunpower to achieve better protection. This is the Springsharp report:

Ger/BB/1910, Germany Battleship laid down 1910

Displacement:
 25,067 t light; 26,234 t standard; 29,000 t normal; 31,213 t full load

Dimensions: Length overall / water x beam x draught
 580.00 ft / 580.00 ft x 100.00 ft x 33.30 ft (normal load)
 176.78 m / 176.78 m x 30.48 m  x 10.15 m

Armament:
      12 - 11.00" / 279 mm guns (4x3 guns), 670.00lbs / 303.91kg shells, 1910 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      3 - 11.00" / 279 mm guns (1x3 guns), 665.50lbs / 301.87kg shells, 1910 Model
   Breech loading guns in a turret (on a barbette)
   on centreline amidships
      12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1910 Model
   Quick firing guns in casemate mounts 
   on side, evenly spread
   8 guns in hull casemates - Limited use in heavy seas
 Weight of broadside 11,333 lbs / 5,140 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 13.0" / 330 mm 345.00 ft / 105.16 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 92 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 345.00 ft / 105.16 m 33.00 ft / 10.06 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 13.0" / 330 mm 9.00" / 229 mm  13.0" / 330 mm
 2nd: 13.0" / 330 mm 9.00" / 229 mm  13.0" / 330 mm
 3rd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 13.00" / 330 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 28,028 shp / 20,909 Kw = 20.00 kts
 Range 6,900nm at 15.00 kts
 Bunker at max displacement = 4,979 tons

Complement:
 1,110 - 1,444

Cost:
 £2.224 million / $8.895 million

Distribution of weights at normal displacement:
 Armament: 1,410 tons, 4.9 %
 Armour: 11,920 tons, 41.1 %
    - Belts: 3,429 tons, 11.8 %
    - Torpedo bulkhead: 1,685 tons, 5.8 %
    - Armament: 3,614 tons, 12.5 %
    - Armour Deck: 2,928 tons, 10.1 %
    - Conning Tower: 264 tons, 0.9 %
 Machinery: 1,158 tons, 4.0 %
 Hull, fittings & equipment: 10,580 tons, 36.5 %
 Fuel, ammunition & stores: 3,933 tons, 13.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   53,302 lbs / 24,177 Kg = 80.1 x 11.0 " / 279 mm shells or 12.3 torpedoes
 Stability (Unstable if below 1.00): 1.04
 Metacentric height 5.4 ft / 1.6 m
 Roll period: 18.1 seconds
 Steadiness - As gun platform (Average = 50 %): 88 %
   - Recoil effect (Restricted arc if above 1.00): 0.66
 Seaboat quality  (Average = 1.00): 1.76

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.526
 Length to Beam Ratio: 5.80 : 1
 'Natural speed' for length: 24.08 kts
 Power going to wave formation at top speed: 41 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 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:  28.00 ft / 8.53 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (43 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 21.60 ft / 6.58 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 62.7 %
  - Above water (accommodation/working, high = better): 141.4 %
 Waterplane Area: 39,563 Square feet or 3,676 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 185 lbs/sq ft or 904 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.91
  - Longitudinal: 2.23
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather