Yeah, i've never seen anything like Fabianski's goalkeeping either
Chelsea lost Cech (who always gets injured for CL matches

), Essien and Bosingwa were out for practically all the season, A.Cole got injured too. J. Cole.. oh well he's somewhat always injured
Rooney and VDS injuries hit united pretty hard imo.
And then there was liverpool who maybe didn't get as much injuries (in numbers) as Arsenal or Chelsea but they suffered injuries on their key players and didn't had enough depth.
One of the highlights of last season was seeing Totthenham get the 4th place ahead of City