I think #1 (traffic lights) won't ever happen as part of AP. It will be part of FSD. Too many tricky intersections out there where even a human is like, uh, which light is for which road? That's going to be dependent on high definition maps coupled with a pretty developed NN.
I don't think traffic lights/stop signs will ever be reliable. I only say that because in my area sometimes the signs are not really that visible. The Lights can be if it was part of a bigger grid such as IoT. Unfortunately, the infrastructure is not there and presents a big security risk.
The problem is, they can’t ‘trickle out’ FSD features like AP.
It would be disappointing if the car has the capability to stop at traffic lights, but they withhold the feature for, say, 5 years awaiting for complete FSD capability