Wasn't it Churchill who was First Sea Lord at the time who broke the Cruiser rules by getting merchant ships and Q ships to attack german subs?

The major flaw with the Jutland fleet was found to be shell and cordite handling. Doors between the different handling rooms/magazines and the turrets were left open. This added to their already weak armour led to them being refered to floating coffins.
If Hood had been rebuilt as Repulse was she'd have probably survived her encounter with the Bismark. It was a fairly lucky shot that finished Hood off but if she'd had better deck armour she'd have survived. Hard to believe only three men survived from nearly two thousand. Very humbling.