I am using warp stabilizer to smooth out some shake in some handheld footage, but after effects cuts off the head of the actors too much. Is it possible to get the program to keep the head framed well, during the process, or no?
If Warp Stabilizer is cropping your footage too much, try turning down the smoothness or changing the framing to "Stabilize Only" or "Stabilize, Synthesize Edges". Usually excessive cropping occurs when the shot changes a lot from start to finish or when there isn't a good point of reference for stabilization, so it might also help to cut the shot into pieces and then adjust reassemble them (you'll have to adjust the position/scale/rotation) after stabilizing.
If none of that helps, you might want to try a different stabilization technique, such as "Stabilize Motion" in the Tracker panel.