I've heard of some folks with Asymetric reefing the main so the spin is getting more wind. I would think reefing the main or dropping it would have been a faster option. As downwind, more SA forward is usually better. Then again, I have seen some reports where boats with gaff mains have out sailed a marconi rig down wind, same boat, same SA. BUT the marconi beat the gaff upwind! in the end, a good race none the less.
in general, as mentioned, better to wing on wing, or not sail direct down wind, at 120-160* would have been better than letting the sail collapse, which also wears out the sail sooner.
She drives me boat,
I drives me dinghy!