Re: Problem appears to be clockwise rotation
" it appears the rocket still has a slight 2-3mph clockwise rotation/motion 'spin' in the final few seconds"
Unlikely. SpaceX don't spin-stabilise on the way down - for the very simple reason that centrifugal forces (ok ok, centripetal) sloshes the fuel around the sides of the rocket and subsequently starves the engines (this was discovered even before they attempted barge landings)
The grid thingies are there to keep it _from_ spinning as well as to guide it back to landing.
It looks to me that as the rockets shut off, that leg popped. Elon's still doing better than anyone else who's tried this shit and we don't have telemetry telling us what went wrong. He does. :)
Biting the hand that feeds IT
