Did bitmain say if they would replace the controller in the next batch - or will they just keep using the workaround (i.e. hack)?
They weren't even clear on if and when they'd use the hack, but the only US contact I have took the patch. I can only hazard a guess that there is zero chance of them using a different controller this late in their production phase.
As for btcguild, to stay on topic, it's probably time you further increased the minimum/starting diff here anyway given what hardware is left hashing these days.