I think when we both talk about NoA I think we are talking about slightly different parts of it. When I talk about NoA, I mean when car is operating in Navigate On Autopilot mode (I have the option enabled for every trip to use when circumstances arrive) and single blue (middle of lane) line is active. I think you are more specific, at least in above, in that when you talk about NoA, you are talking about it offering lane changes and you confirming? I very rarely accept its suggestions (it doesn't seem to adhere to setting descriptions in UI, ie wants to overtake even when minor speed differential [~1mph] even though help says major speed differential), but I do use auto lane change and car will be in NoA mode when I do - I think you refer to this as 'to use fsd'?
Anyhow, irrespective of terminology, my personal experience is that singe early December, auto lane change has dramatically improved and that manoeuvres I never had dreamt of attempting even up to early Dec, are now very straight forward, irrespective of how quiet the road is. Some of this will be as a result of adding several hundred more miles to my confidence, but I do truly believe that auto lane change had a major transformation with the early December release and is far more assertive than before resulting in minimal lane change aborts. This is why I suggest that you give things another try.
I think we are both on same page re hard braking. I am always on lookout in rear view mirror and will adjust any potential manoeuvre if I think a potential problem is bubbling up. I've had a couple of disconcerting braking episodes (reduced around 20mph over quite short distance), but not full on like some have had, but even so, enough that a car following too close behind could quickly become a problem.
As for your other experiences, I personally do not act upon NoA's suggestions in majority of cases, so @I don't think you would see this as NoA even though it was NoA in operation. If an off/on ramp, rather than lane depart/merge, I would only use NoA's suggestions in situations where I know how car is likely to behave (usually badly) as I have previously tested its behaviour at that exit. With long queues, I would normally be in the platoon already rather than needing to cut in and this would only be for situation where the whole lane exits and doesn't flare into two - otherwise, I would be off autopilot and probably TACC altogether by that point.
99% of the time...