OK, I've got maybe 100 miles under my belt now on FSD Beta. Here's my impressions. The good and then the bad.
Freeway driving is WAY, WAY, WAY better. Lane changes are smooth as are merges from two to one lane and the reverse. Freeway to Freeway interchanges are as good as the best human driver. No more wandering around when the lane widens momentarily. From what I've seen so far, and I really need to see more first to really say this, but from what I saw last night and today--just what I myself saw on my drives--well, freeway driving looks to be at least L3 or maybe even L5 capable. That's what I saw on the freeway, although I saw no construction sites on the freeway. The only issue I had on the freeway is just an annoyance; when diverging from a single lane into two lanes the car always chooses the left lane. After a bit it gets over to the right. It should bias the right lane.
Summon is WAY, WAY better. Wow, It's actually useful now. I'll post a video later, but for now: It confidently pulls out, slows or stops for pedestrians and traffic and handles difficult situations. I parked it in a paved parking lot and summoned it to a gravel parking lot surrounded by boulders. It stopped for a very short bit to figure out how to get in the gravel parking lot, but it figured it out and did an absolutely great job. It even drove out of the "Summon Circle" to get into the gravel parking lot. Wow. This is going to be handy this winter. Is it perfect? No, it still wobbles sometimes choosing a lane. But it is useful and I plan on using it if required to avoid inclement weather.
The parking lot speed limit of 15 is too fast. Yes it slows down for pedestrians, but 10 mph is just saner in a parking lot. That said, FSD Beta 10.2 does a great job finding it's way out of parking lots, and finds it's way to the front door of the store in large parking lots with lots of foot and car traffic. Also, one parking lot is mistakenly identified as a road and defaults to 25 mph.
In some neighborhoods, 25 mph is just way too fast. In my neighborhood, 20 - 22 is appropriate. I'm not sure how neighborhoods will be identified over other 25 mph zone, but 25 is too fast--even if that's the speed limit. Compounding this is that FSD Beta, while it does an excellent job on side streets, biases too far to the right. It passes parked cars too closely when it doesn't need to; if a child runs out from behind a parked car... If you have cars parked on both sides and no oncoming traffic, driving down the center-right side of the road makes sense to increase reaction time. Ideally, you leave enough room for a door to open unexpectedly.
I had to intervene for the one construction zone I drove through, the car got totally confused and it wasn't a bad zone really.
Gates across roads were not recognized both of two times encountered. Intervention required.
Traffic signals are handled with aplomb. Many stop signs are approached with too much timidity.
I think a lot of perceptions--mine included--are skewed by two weeks of driving like a spooked sloth. Country roads I first thought were taken too aggressively I now see as the exact speed I'd drive. I will agree that driving in neighborhoods is too aggressive. Elsewhere, I'm thinking maybe pretty good.
Anyone who thinks FSD isn't making amazing progress is mistaken, IMHO. I was and am amazed. Yes I intervened, no it's not ready for wide release. But just a couple of years ago the drives I took today were the stuff of science fiction. The progress in the last year has been marked and steady. For the first time, I am convinced we will see L5 in the next few years. Maybe sooner if they can do a freeway only L5 release.
Let me add that while amazing, this release should be limited for a while. It can and does do things that you better be on your toes to catch, just as the email we got warned.