If so, as Aerocat pointed out, would changing the pack output really do much?
Obviously it will depend on the aircraft. Some aircraft the cabin temp. is controlled only from the flight deck but on larger aircraft each zone can be regulated by the cabin crew as well, within certain limits, defined by where the controls are set on the flight deck. From my experience it is possible to lower the cabin temperature significantly using the flight deck controls. Again, my experience only but I find hot, stuffy air round my face at any time is uncomfortable.