I guess order of priority without the number ranking would be
2,1,3
Lane selection seems like a non issue as I just tell it what lane I want to be in. Annoying and can fail sometimes but a non issue since you can always prevent it.
Similarly pressing the accelerator is not that big a deal (even less of an issue really; no one has to know about it).
The stop sign thing is like an 8. It’s related to the stopping issues and is a major usability issue.
improper lane selection would be my 10. Esp if you count all the phantom signaling. I can't really anticipate or prevent those, so I'm forced to look like a lost tourist or an idiot. More likely an idiot because my license plate state fits right in (small states in New England). To be clear, the car signals with the intent to go straight, which is the correct route, but it makes people think I'm moving out of the lane. and sometimes, a left signal is immediately followed by a right, which looks really dumb, unless people assume I was trying to turn off the signal and overcompensated on the stalk. And of course there are the times it signals with the intent to get into the wrong lane. Sure I can prevent the lane change, but the signaling already happened.
At any rate, I am pretty concerned that lane selection hasn't improved since this particular behavior was introduced (10.10). I remember at the time thinking this regression gets a pass (a lot of other noticeable improvements came with 10.10), but now I'm starting to wonder if their current vectorized lane approach (introduced with 10.10) is not viable. Should have seen some improvement by now. I have a hard time imagining Tesla has not gotten any feedback on this problem.