Complete front rebuild with powerflex bushings and new control arms. Steering is better, suspension is tighter, but vibration level is about the same as before all the work.
What I have not done:
changed any fluids besides motor oil
checked rear driveshaft
checked rear axles in detail (just moved them to see how much play and they seemed OK)
Front driveshaft seems OK, I don't know the backlash spec but nothing seems to wobble