I might have some opinions on not starting a third settler and working multiple zero production tiles at T50.
SH was just a useful placeholder build for testing worker-first vs settler-first. I'm not really that crazy about it, so the discussion is moot. The reasons not to are the GP and the cost of Masonry. I actually think SH with stone is pretty awesome for eliminating monuments altogether at the cost of 60h (minus the 30h you'd spend on a monument in Bombay anyway).
I think we need to establish whether we wanna build settler first. Worker and settler seem roughly equivalent in both my and LC's tests so far. Is that right? We can do revised testing after T0, when we see the full BFC, but I honestly think it's too early to start planning stuff like the MC-GE gambit.