I can adapt to most of this; I was mainly set off by the constant dropping of posts from the Most Recent list. I’m guessing that was a side effect of switching people to the new interface gradually; people’s posts would disappear while they were in transition perhaps. They seem to have gotten that straightened out now. They just made a tweet to that effect recently.

While there are many issues, one principle is: stability. Keep changes to the interface minimal, and perform major overhauls very rarely. Changing the interface confuses users, offsetting the value of any gains made by small improvements. I’ve been on Facebook for just over a year, and they’ve had four non-trivial interface changes in that time. Some of them I considered mild improvements, though it wasn’t clear they were worth the price in time and effort for them or their users. And this last change has been a mess, as I said.