Agree with all of the above.
I'm an experienced S/3 AP 1 and 2.5 driver and have been very pleased with AP since its toddling start in 2015.
NOA is actually far from terrible. However, changing lanes in preparation for exiting is one of the tougher driving challenges which all of us face. In SoCal, where so many drivers operate under the SUOSTS system (Speed Up On Seeing Turn Signal), it can be the most most nuanced, artful, and stressful part of driving.
Not necessarily the sort of thing one would be comfortable inviting a stranger to drive ... in your car. Make the stranger a tad awkward, hesitant, indecisive, and non-assertive, and the discomfort level rises fast.
As excited as many of us are to watch autonomous driving technology begin to stretch its wings, the truth is that most of us just aren't happy turning the scariest part of driving over to a rookie ... who doesn't drive the way we like to drive ... probably doesn't drive as well as we drive ... stumbles, hems, and haws at just the wrong moments ... while we sit in the driver's seat waiting to pick up the mess and avoid disaster.
All of that said, so long as you don't put it into crazy-tough situations (SB 405, attempting to exit Valley Vista ... with zero-gap merging traffic from NB 101 ... and then crossing two lanes of inbound traffic from SB 101 ... all within half a mile), it actually does a pretty responsible job.
I've deliberately (and on high alert) "confirmed" with cars next to me or in my blind spot, and it's always waited for them to clear. Biggest gripe, as others have noted is that its go-to move is the slowdown-and-slink-behind, even when a speed-up-and-slide-ahead would be far safer and less disruptive to those behind.
On the plus side, unlike a human driver, it can check on traffic coming up from behind in the new lane without interrupting tracking of the car ahead in the current lane. This is the one area where multi-GHz computer + multiple cameras can multi-sense better than a human.
On the still-learning side, I can say that the Nav part of NOA whiffed for me twice, once trying to move me left out of the proper NB 405 --> WB 118 ramp lane and another time not wanting to get right enough for the EB 118 --> SB 405 transition.
TLDR: Early days. And, we may have overestimated our readiness to invite a different-styled stranger to share the driver's seat with us during the hairiest moments of our drives.