My thoughts on these based off papers I've seen/done:
C1 a bit lower C3 about right S2 about right
FP1 a bit higher FP2 a bit higher FP3 a bit lower (I assume you meant to type 56 for an A rather than 46?)
M2 fingers crossed this is right, I'm buggered if the A boundary is above 50. 49 for an A would be good.
D1 and D2 about right, maybe a bit higher for D1
Yeah apologies 56 not 46 for FP3. There were some very tough papers this year in comparison to previous years. However the only two papers I struggled on were M2 and FP2, which was a real shame since these were two of my best units. An A in M2 has been below 50 on 2 or 3 occasions and this paper was harder than both of those. Possibly for D1, but there were some slightly unorthodox 1 markers.