What they’re NOT saying is that said pressure leaks were caused when the saw blade got stuck as they were prepping for Top Kill.
Picture a leaking hose under pressure. Close the nozzle and the water leaks are worse than when the nozzle is open. The stuck saw blade was the closed nozzle.
the saw blade did not obstruct the pipe a significant amount. There were reports of this sub-sea floor damage a month before the explosion.
No it wasn't. The 'saw' was a wire rope covered with diamonds. It was not some big round saw blade as you are describing, and could only have provided an almost immeasurable back pressure.
No, the saw ‘blade’ was a diamond impregnated cable. It could not have closed off the flow.