My anachronistic King Edward VII class design

As far back as the latter 1980's, I was already playing around with anachronistic versions of real ships. My King Edward VII design was as if they had been radically rebuilt about 1918 or so. The 4-9.2in guns are now in superfiring, twin turrets, mounted above the 4-12in guns. The 10-6in QF guns are in four turrets: two triple and two twin. They have a clipper bow and a tripod foremast with control top. The the mainmast is a post, with a derrick. There is a light topmast with yards. The speed is 18 knots. This is the Springsharp report:

King Edward VII (anachronstic), Great Britain Battleship laid down 1903 (Engine 1909)

Displacement:
 13,086 t light; 13,703 t standard; 14,750 t normal; 15,588 t full load

Dimensions: Length overall / water x beam x draught
 451.15 ft / 450.00 ft x 78.00 ft x 25.00 ft (normal load)
 137.51 m / 137.16 m x 23.77 m  x 7.62 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1903 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      4 - 9.20" / 234 mm guns (2x2 guns), 389.34lbs / 176.60kg shells, 1903 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, all raised mounts
      10 - 6.00" / 152 mm guns (4 mounts), 108.00lbs / 48.99kg shells, 1903 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships
 Weight of broadside 6,093 lbs / 2,764 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 295.00 ft / 89.92 m 16.00 ft / 4.88 m
 Ends: 5.00" / 127 mm 140.00 ft / 42.67 m 12.00 ft / 3.66 m
   15.00 ft / 4.57 m Unarmoured ends
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 295.00 ft / 89.92 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 3rd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 2 shafts, 13,617 ihp / 10,158 Kw = 18.00 kts
 Range 4,500nm at 12.00 kts
 Bunker at max displacement = 1,885 tons (100% coal)

Complement:
 668 - 869

Cost:
 £1.244 million / $4.978 million

Distribution of weights at normal displacement:
 Armament: 762 tons, 5.2 %
 Armour: 5,737 tons, 38.9 %
    - Belts: 2,186 tons, 14.8 %
    - Torpedo bulkhead: 546 tons, 3.7 %
    - Armament: 1,479 tons, 10.0 %
    - Armour Deck: 1,409 tons, 9.6 %
    - Conning Tower: 117 tons, 0.8 %
 Machinery: 1,047 tons, 7.1 %
 Hull, fittings & equipment: 5,540 tons, 37.6 %
 Fuel, ammunition & stores: 1,664 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,880 lbs / 10,378 Kg = 26.5 x 12.0 " / 305 mm shells or 4.7 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 3.8 ft / 1.2 m
 Roll period: 16.7 seconds
 Steadiness - As gun platform (Average = 50 %): 85 %
   - Recoil effect (Restricted arc if above 1.00): 0.79
 Seaboat quality  (Average = 1.00): 1.70

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.588
 Length to Beam Ratio: 5.77 : 1
 'Natural speed' for length: 21.21 kts
 Power going to wave formation at top speed: 43 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  22.00 ft / 6.71 m
    - Forecastle (20 %): 18.00 ft / 5.49 m
    - Mid (50 %):  18.00 ft / 5.49 m
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 18.32 ft / 5.58 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 83.7 %
  - Above water (accommodation/working, high = better): 130.3 %
 Waterplane Area: 25,393 Square feet or 2,359 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 152 lbs/sq ft or 742 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.91
  - Longitudinal: 2.18
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 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