You need to take the Deep Purple out of her sound system...she thinks she's a highway star! XD
Glad it's settling in better, sounds like you've got it cleaned up well. Wonder why the QS UD didn't do well...I have no issues, but I may drive differently.
Something I've heard from old timers on the Cadillac forum, if you have pulsations on braking, you can 'clean' the brakes. Get 'er up to speed on a suitable stretch of highway, and from highway speed, BURY the dead pedal down to ~20 mph. DO NOT STOP, and get up to speed again. Repeat 2-3 times, then go for a cooldown cruise. Seemed to work for me.