I've started forcing lane change by signaling lane change - so that FSD does a proper lane change - which BTW, is quite good now.
Yup.
Let's give Tesla a bit of credit where credit is due, since we've all gotten extremely good at bringing up the faults (myself included).
Lane changes have become butter smooth.
Think about how bad lane changes were a couple of years ago. It reminds me of how the car currently handles traffic circles. The car stops, thinks, jerks the steering wheel around, plays with the blinker a few times in different directions, creeps a bit, etc. I remember lane changes exhibiting similar behavior. Got a goose egg on my head from hitting the side window when AP bailed out of a lane change after it had arrived in the other lane... suddenly freaked out, janked back the other direction. No reason for it, either.
There was a lot of regression, too; many releases saw lane changes get really bad before they finally got better.
Now it is a smoothly functioning feature, and it's been pretty darn good for some time.
Driving a car is a complex operation, yet they have the basic functionality there, it just needs time to bake, just like lane changing.
But yeah... lane changes in 10.4 are darn near humanly good. Although there are times that I wish FSD wouldn't insist on demonstrating its lane changing prowess... like moving over one lane to the left when there's a right turn .1 miles ahead.
We'll get there, and it's gonna be a lot of fun to watch along the way.