Why is the Ger/CB/1911 design so good?

I have a pencil drawing dating from September 2001 for the Ger/CB/1911 design. Unlike my 1971 efforts, this looks suitably German. What I don't understand is why the result is so good. It is especially perplexing, as it doesn't rely on lightweight machinery, unlike my latest efforts:

Ger/CB/1911, Germany Battlecruiser laid down 1911

Displacement:
 25,562 t light; 26,454 t standard; 30,840 t normal; 34,348 t full load

Dimensions: Length overall / water x beam x draught
 751.00 ft / 750.00 ft x 100.00 ft x 26.17 ft (normal load)
 228.90 m / 228.60 m x 30.48 m  x 7.98 m

Armament:
      6 - 12.00" / 305 mm guns (2x3 guns), 864.00lbs / 391.90kg shells, 1911 Model
   Breech loading guns in turrets (on barbettes)
   on centreline, all forward, 1 raised mount - superfiring
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1911 Model
   Quick firing guns in casemate mounts 
   on side ends, evenly spread
 Weight of broadside 6,048 lbs / 2,743 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 500.00 ft / 152.40 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 500.00 ft / 152.40 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 127,427 shp / 95,060 Kw = 30.00 kts
 Range 7,200nm at 18.00 kts
 Bunker at max displacement = 7,894 tons

Complement:
 1,163 - 1,512

Cost:
 £2.254 million / $9.015 million

Distribution of weights at normal displacement:
 Armament: 756 tons, 2.5 %
 Armour: 8,848 tons, 28.7 %
    - Belts: 2,902 tons, 9.4 %
    - Torpedo bulkhead: 925 tons, 3.0 %
    - Armament: 978 tons, 3.2 %
    - Armour Deck: 3,873 tons, 12.6 %
    - Conning Tower: 169 tons, 0.5 %
 Machinery: 5,172 tons, 16.8 %
 Hull, fittings & equipment: 10,787 tons, 35.0 %
 Fuel, ammunition & stores: 5,277 tons, 17.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   49,847 lbs / 22,610 Kg = 57.7 x 12.0 " / 305 mm shells or 7.6 torpedoes
 Stability (Unstable if below 1.00): 1.45
 Metacentric height 9.5 ft / 2.9 m
 Roll period: 13.7 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.19
 Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.550
 Length to Beam Ratio: 7.50 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  27.00 ft / 8.23 m
    - Forecastle (20 %): 20.00 ft / 6.10 m
    - Mid (50 %):  20.00 ft / 6.10 m
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 20.56 ft / 6.27 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 91.6 %
  - Above water (accommodation/working, high = better): 171.5 %
 Waterplane Area: 52,342 Square feet or 4,863 Square metres
 Displacement factor (Displacement / loading): 122 %
 Structure weight / hull surface area: 153 lbs/sq ft or 748 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.00
  - Longitudinal: 1.06
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent