Which one is most flawed of those three?
FRWL - SPECTRE boats machine gun Bond's get-away boat (which Grant was to use), but the bullets only manage to riddle the gasoline drums with big holes...without blowing them up! LOL! Instead, Terrence Young conveniently gets the oil drums to 'spill' their explosive cargo onto the water, and then - equally conveniently - has the here-to-fore smart SPECTRE strong man, Morzeny, stop all three of his boats in the middle of the spill so that they can be entrapped by the soon to be ignited gasoline. LOL!
TWINE - The rudder is out of the water and can't 'dig' into the asphalt and concrete of London streets. Yet Bond is able to 'steer' the Q boat left and right through streets and markets and restaurants as if it had the traction of the ensuing police cars! Have I missed something? Does the Q boat have rubber wheels?

Q0S - Bond manages to get the second of General Medrano's two zodiacs - which is right on top of his own boat - to 'dig' into the port waters and then launch into a flip over his head.

So, which of the above three is the most flawed boat chase/fight? And which of them most adversely impacts the movie it's in?