some level of motion vector stabilization might help, but as I once explained to an overpromising DoP: the problem with parallax jitter is stabilizing any one point makes all the others worse.
Another excellent suggestion. But theres too much work happened after the comp: tonnes of warping on the talent and I really dont have time to retrack everything. Especially now its been signed off. So i was hoping yo add inverse jitter to the bg so it might right itself at the end.
There ought to be a matte in the pipeline where you can separate the two plates. Keep the talent stabilized, use the inverted matte, pixelspread, stabilize the bg and comp again?