Agreed - I'd need to see it again, and it took a little time after the match had finished, but I think it was a change in execution and adaptation.
During the 1st half, we did well to adapt to the ref (and George did well in making him explain his reasoning, so that we COULD adapt).
For me the biggest change at HT was the communication between Spencer and Ford. In the first half, either Ford wasn't standing where Spencer expected him to be, or Spencer wasn't putting the ball where Ford wanted it (they're kinda the same thing); and George was halting his movement, reaching behind or above him to catch the ball, taking away his time to do anything, meaning that he was then snatching at his kicks (and usually had to be kicks either because of pitch position, or not shovelling on shit). I think there was also some issues with presentation of the ball from the pack to Spencer. So poor presentation, couple with poor communication/positioning => poor pass => poor execution => playing on the back foot in the wrong parts of the pitch.
I think that that's what was cleared up in the 2nd half; but I don't know if it was the forwards adapting to Spencer, Spencer adapting to Ford, Ford adapting to Spencer, or a combination of all (I suspect a combination of all).
Marginal gains leading to a virtuous cycle