I did find the auto lane changes can be a little bit of a pain in the way it's implemented here in Aus. (Note- I had it set to confirm lane changes rather than just let it do them iteself, meant to try it with that off but never got around to it. I THINK though that it doesn't really matter in Australia, you still have to confirm either way).
The issues I found were that when it tells you it wants to change lanes (or you can initiate with the indicator), you have to use the indicator and give the wheel a tug for it to do it. Couple of things to be aware of, I was in the habit of using the half press on the indicator stalk from ICE cars, so you just do 3 or 4 blinks and change lanes. If you do that in the Tesla, what ends up happening is that it starts changing lanes then it's half way accross when the 3 or 4 blinks finish, it thinks you changed your mind and veers back into the original lane.
Completely user error but took a bit to get out of that habbit. Will be better in the M3H with the indicator buttons, also when I set the indicator stalk to 'auto cancel' later in the trip, that made it a lot better.
The other one is the tug of the wheel, unlike the slight pressure it asks you to put on EAP/FSD, it requires a bit more of a tug I found, and quite often it is very easy to knock it out of AP, which again is annoying. This is a quirk of the Australian regulations which makes it more dangerous than if it was just like the US and only required the indicator to confirm (and also allows you to just let it change lanes itself).
Just a few things I found to be aware of, I'm hoping we'll be in line with the US soon enough (2 weeks?
), so some of these annoyances can be removed and EAP/FSD will work a lot better than it does currently.