From my own recollections of SDSR the FCO were quite damming of the process & ridiculous timescales, successfully distancing themselves from the 'Strategic Review' at quite an early stage. Whilst this may have done little to help the military the individuals from the FCO used similar emotive language as the military people when voicing their justifiable concerns.
The FCO is suffering its own funding crisis at a time of world instability. Perhaps the FCO has only ever been a fair-weather friend to the MoD but with both departments broke their is little either can do to help out. I almost feel sorry for the FCO reps that are being forced in front of the cameras to explain themselves - given their pivotal role in all this mess you never actually see a Treasury spokesman when the going gets tough...