For the record, anyone following can ignore my Nov post about the steps involved in resolving "Active Park Assist Disabled" resolved the rough-shifting.
While it was indeed better for awhile, it ultimately turned rough again. In fact, it's happened a couple times now where I've had it in for other work and it comes back shifting smooth as new for a bit. My theory is that the dealer resets the computer so that it re-learn's the driver and it's smooth again, but only for awhile. Haven't yet inquired with the dealer if in fact they are doing such a reset, as it was only recently I came up with this idea.
Every time I have raised the rough shifting problem with the dealer, they tell me it's "normal" and there's no known fix. I inquire every time I go in, hoping that at some point enough complaints come in they get around to issuing a TSB and we can get a real fix in place for this.