A rather edgy, anachronistic Invincible design

This is based on this pencil drawing that I believe dates from the latter 1980's:

The ship has 8-12in/45 guns in three turrets, the twin being superfiring. The hull is flush-decked and the ship has oil-fired boilers. As you can see, this drawing is extremely freehand. The date of the machinery and the oil-fired boilers makes for a much better ship than the original. This is the corresponding Springsharp report:

Invincible, Great Britain Battlecruiser laid down 1912 (Engine 1914)

Displacement:
 16,178 t light; 16,942 t standard; 18,398 t normal; 19,563 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (567.91 ft / 567.00 ft) x 78.00 ft x (26.00 / 27.31 ft)
 (173.10 m / 172.82 m) x 23.77 m  x (7.92 / 8.32 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 , 1912 Model
   2 x Triple mounts on centreline ends, majority forward
   1 x Twin mount on centreline, forward evenly spread
  1 raised mount
      16 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1912 Model
   8 x Twin mounts on sides, forward deck aft
  8 raised mounts
      4 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1912 Model
   4 x 2 row sextuple mounts on sides, aft deck forward
 Weight of broadside 7,542 lbs / 7,542 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 370.00 ft / 112.78 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 190.00 ft / 57.91 m 16.00 ft / 4.88 m
   7.00 ft / 2.13 m Unarmoured ends
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 370.00 ft / 112.78 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 78,432 shp / 58,510 Kw = 28.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 2,621 tons

Complement:
 789 - 1,026

Cost:
 £1.695 million / $6.781 million

Distribution of weights at normal displacement:
 Armament: 1,369 tons, 7.4 %
 Armour: 4,864 tons, 26.4 %
    - Belts: 1,978 tons, 10.8 %
    - Torpedo bulkhead: 534 tons, 2.9 %
    - Armament: 1,095 tons, 5.9 %
    - Armour Deck: 1,153 tons, 6.3 %
    - Conning Tower: 105 tons, 0.6 %
 Machinery: 3,021 tons, 16.4 %
 Hull, fittings & equipment: 7,452 tons, 40.5 %
 Fuel, ammunition & stores: 2,220 tons, 12.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   23,010 lbs / 10,437 Kg = 26.6 x 12.0 " / 305 mm shells or 3.3 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.82
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.560 / 0.567
 Length to Beam Ratio: 7.27 : 1
 'Natural speed' for length: 23.81 kts
 Power going to wave formation at top speed: 57 %
 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 (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  26.00 ft / 7.92 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  22.00 ft / 6.71 m
    - Aft deck: 35.00 %,  22.00 ft / 6.71 m,  21.00 ft / 6.40 m
    - Quarter deck: 15.00 %,  21.00 ft / 6.40 m,  20.00 ft / 6.10 m
    - Average freeboard:  22.19 ft / 6.76 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 118.3 %
  - Above water (accommodation/working, high = better): 165.2 %
 Waterplane Area: 31,156 Square feet or 2,894 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 157 lbs/sq ft or 768 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.81
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent