I just updated to Pie 52.0.A.3.27 a couple of week ago and I have to say I'm not digging it.
I prefer the Oreo UI over Pie - the nav bar is white most of the time, doesn't hide at specific (splash) screens like it does in Oreo, volume control is now on the side and I feel like it's harder to slide as the space is smaller...
Sometimes my screen rotates by itself even though I have auto-rotate off all the time, and it won't rotate back unless I turn auto-rotate on and off again to reset it.
The clock is on the other side and I can't break my 5+ yr habit of looking at it on the right instinctively!
Also the top tray slide down notif bar has the icons' circle borders spilling outside the side frame line of the which bother me so so much. And now the icons tray was black and it decided to turn white today and I am really not liking it.
I have an update available to 52.0.A.3.126, does it fix some of these issues? I assume a factory reset will always put me back at Oreo if I end up continuing hating Pie?