Well I got the car back and now AP is working properly again. They did install a new -1.2 degree camera mounting plate, just like that TSB document suggested may be necessary. Now I have a new problem though.... With the camera pointed more downward, it now "sees" the fuzzy glareshield piece and about the bottom 10% of my dashcam videos are just a black bar. Per the TSB, when they install the new camera mount, they're also supposed to install a revised version of the glareshield part, which I'm guessing doesn't interfere with the camera's field of view. I checked my part, and it's not one of the recommended revisions, so Tesla clearly just left the old one in there. I'm checking with them to see if they can install the new glareshield part, or at least just sell me one. :/