Very well said Ringwayman. These moans re de-incing should be directed at the handling agent, but I'd imagine you pay peanuts you get peanuts comes into play.
There was a tremendous amount of effort from MAN themselves to clear the airfield, and they did it well. It's also made to sound like there was only a sprinkling of snow where I would describe it as significant.
MAN has also increased in capacity to clear snow, there are many photos online of an army of ploughs just parked up between T2 and T1 awaiting action. I'd say too many for an airport that rarely gets snow, but I suppose when it does snow there is a large area to clear. They'll get used about twice a year !