The Ger/BB/1916 large battleship

I have this specification and sketch of a very large German battleship with 10-21in and 24-5in guns. The speed is specified as 20 knots with 85,000 SHP. I had specified 5,000 tons of fuel oil. I tried to get the power and fuel of the original specification. I probably have too much protection, as the original had 36,884 tons of protection. The ship is short and wide at 1:6 beam to length. The Springsharp report can make more than 20 knots on the power, even with a greater displacement that is needed for adequate hull strength. This is the Springsharp report:

Ger/BB/1916, Germany Battleship laid down 1916 (Engine 1931)

Displacement:
 87,495 t light; 91,857 t standard; 94,738 t normal; 97,042 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (915.01 ft / 900.00 ft) x 150.00 ft x (35.70 / 36.45 ft)
 (278.89 m / 274.32 m) x 45.72 m  x (10.88 / 11.11 m)

Armament:
      10 - 21.00" / 533 mm 45.0 cal guns - 4,669.98lbs / 2,118.27kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline ends, evenly spread
   2 x Twin mounts on centreline ends, evenly spread
  2 raised mounts
      24 - 5.00" / 127 mm 50.0 cal guns - 66.16lbs / 30.01kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1916 Model
   12 x Twin mounts on sides, forward deck aft
  4 raised mounts - superfiring
      Weight of broadside 48,288 lbs / 21,903 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 550.00 ft / 167.64 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 94 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 550.00 ft / 167.64 m 35.70 ft / 10.88 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 18.0" / 457 mm 12.0" / 305 mm  18.0" / 457 mm
 2nd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 8.00" / 203 mm For and Aft decks
 Forecastle: 6.00" / 152 mm  Quarter deck: 8.00" / 203 mm

   - Conning towers: Forward 18.00" / 457 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 84,899 shp / 63,335 Kw = 22.35 kts
 Range 5,000nm at 15.00 kts
 Bunker at max displacement = 5,185 tons

Complement:
 2,699 - 3,509

Cost:
 £12.985 million / $51.940 million

Distribution of weights at normal displacement:
 Armament: 7,115 tons, 7.5 %
 Armour: 40,414 tons, 42.7 %
    - Belts: 7,624 tons, 8.0 %
    - Torpedo bulkhead: 5,812 tons, 6.1 %
    - Armament: 10,556 tons, 11.1 %
    - Armour Deck: 15,616 tons, 16.5 %
    - Conning Tower: 806 tons, 0.9 %
 Machinery: 2,539 tons, 2.7 %
 Hull, fittings & equipment: 37,427 tons, 39.5 %
 Fuel, ammunition & stores: 7,242 tons, 7.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   196,126 lbs / 88,961 Kg = 42.4 x 21.0 " / 533 mm shells or 54.0 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 13.1 ft / 4.0 m
 Roll period: 17.4 seconds
 Steadiness - As gun platform (Average = 50 %): 79 %
   - Recoil effect (Restricted arc if above 1.00): 0.69
 Seaboat quality  (Average = 1.00): 1.58

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and a round stern
 Block coefficient (normal/deep): 0.688 / 0.690
 Length to Beam Ratio: 6.00 : 1
 'Natural speed' for length: 30.00 kts
 Power going to wave formation at top speed: 38 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 17.00 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 %,  36.00 ft / 10.97 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  29.00 ft / 8.84 m
    - Aft deck: 35.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Quarter deck: 15.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Average freeboard:  30.37 ft / 9.26 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 60.1 %
  - Above water (accommodation/working, high = better): 224.3 %
 Waterplane Area: 107,048 Square feet or 9,945 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 284 lbs/sq ft or 1,385 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.50
  - 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