There are plenty people that don't care at all about FSD, so they would enjoy the holiday update(s) far more than any FSD updates. I don't think the teams are the same, but those people probably feel the opposite (that FSD is a waste of resources and more time should be spent on addressing other bugs and improving features that affect everyday usage of the car).
It wasn't specifically in a Holiday update, but some features I enjoy in the more recent updates was the font size toggle (only criticism is the exit number is still too small), the UI update on the charging screen (finally it's now much easier to choose an exact percentage), the update on Energy screen to show more details, etc.