I think that in general Edexcel has decided to steer away from tradition and make the hardest exam papers possible to reduce the number of people getting A's. I've done 90% of all of the previous past papers for unit 1 and 2 and i don't think i've ever seen a paper as strange as the one we got yesterday. So i would assume the same for all other unit 2 edexcel exams.
C2 maths was a terror in itself, but in no way up to the standards of hell that was the unit 1 physics exam.