"too many destroyers" : it there not of destroyers but of the fleets of cruisers with : light cruisers, protected cruisers, battlecruisers, armoured cruisers.
Cruisers ASM : 1/2, Battleships ASM : 0/3, Submarines AS : 0/0.
The submarines were ineffective against the ships in 1914!
"Movement is far too far" : I do not think, in August 1914, the German armies made 30 miles per day! The average was of 100 miles per week, (in train : 200 miles per day).