FFS.. +2/+8C on the maindeck of a 742 is a no-can-do. After hours and hours of cruise coming out of DXB (lets say 35-40C) you might just get about 15C. WTF wasn't this stuff in the rear belly? (fairly decent temp control).
And before anyone talks about what a 744F can or can't do... believe me , it can't (Boeing say it can, but then Airbus said the A380 was a good -F too). I have been in the 400F game since 93. (1st one, 2nd one, 3rd one, 25th one etc etc... ever built).