My opinion is that this gear is too large. Your photo shows that the boot is in the neighborhood of 3 inches longer than your foot. The liner will eat up at most one of those inches and the shell a little more, but that still leaves too much space (and they have not packed in yet). Putting a loose fitting boot inside bindings that are too large for them again is not suggested. I know that is not what you were hoping to hear, but i figure it is better to put this out there now.
Apologies if this is a bummer.
Completely agree, that looks way too large. As I said before, a size 11/44.5 boot with a 27cm foot was probably wrong - not impossible, but highly unlikely. The picture confirms for me that the boots are too big.