Jimmy
Truthfully I'm not 100% sure why it was flap 22 for the CAT II landings, but yes, G/A perf must have been a part of it. Flap 45 just added a lot of drag.
While these guys didn't breach a SOP with their very high bodyangle on touchdown, that is not really the point.
There is no SOP, for example, that says you mustn't land upside down either.