The GB/DL/1927 design (something seems wrong with it)

I'm not sure why, but I suspect something wrong with this design for a British large destroyer or destroyer leader: GB/DL/1927. I was able to get a strong-enough ship right away, but distorted what I had to increase seakeeping ability to a viable level. The ship can make 35 knots and has 6-5.1in DP guns with 12-40mm AA and 8-21in TT. I would be interested to know, if anyone can see an error in this Springsharp design.

GB/DL/1927, Great Britain Destroyer Leader laid down 1927

Displacement:
	1,653 t light; 1,734 t standard; 1,840 t normal; 1,926 t full load

Dimensions: Length overall / water x beam x draught
	390.77 ft / 390.00 ft x 37.00 ft x 12.00 ft (normal load)
	119.11 m / 118.87 m x 11.28 m  x 3.66 m

Armament:
      6 - 5.10" / 130 mm guns (3x2 guns), 66.33lbs / 30.08kg shells, 1927 Model
	  Dual purpose guns in deck mounts with hoists
	  on centreline ends, majority forward, all raised mounts - superfiring
      12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.89kg shells, 1927 Model
	  Anti-aircraft guns in deck mounts 
	  on side ends, majority aft, all raised mounts - superfiring
	Weight of broadside 421 lbs / 191 kg
	Shells per gun, main battery: 180
	8 - 21.0" / 533.4 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 1 shaft, 39,956 shp / 29,807 Kw = 35.00 kts
	Range 3,600nm at 12.00 kts
	Bunker at max displacement = 192 tons

Complement:
	139 - 182

Cost:
	£0.848 million / $3.394 million

Distribution of weights at normal displacement:
	Armament: 53 tons, 2.9 %
	Machinery: 937 tons, 50.9 %
	Hull, fittings & equipment: 663 tons, 36.0 %
	Fuel, ammunition & stores: 187 tons, 10.2 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  518 lbs / 235 Kg = 7.8 x 5.1 " / 130 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.33
	Metacentric height 1.9 ft / 0.6 m
	Roll period: 11.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.61
	Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
	Hull has low forecastle
	  and transom stern
	Block coefficient: 0.372
	Length to Beam Ratio: 10.54 : 1
	'Natural speed' for length: 22.85 kts
	Power going to wave formation at top speed: 64 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 2.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		22.00 ft / 6.71 m
	   - Forecastle (20 %):	14.00 ft / 4.27 m (15.00 ft / 4.57 m aft of break)
	   - Mid (50 %):		15.00 ft / 4.57 m
	   - Quarterdeck (15 %):	15.00 ft / 4.57 m
	   - Stern:		15.00 ft / 4.57 m
	   - Average freeboard:	15.44 ft / 4.71 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 186.7 %
		- Above water (accommodation/working, high = better): 115.6 %
	Waterplane Area: 9,104 Square feet or 846 Square metres
	Displacement factor (Displacement / loading): 63 %
	Structure weight / hull surface area: 40 lbs/sq ft or 193 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.48
		- Longitudinal: 1.70
		- Overall: 0.55
	Hull space for machinery, storage, compartmentation is cramped
	Room for accommodation and workspaces is adequate