I feel like it was fairly customizable - the Mac system settings let you do a lot of drag and drop of controls, and I recall iTerm having a similar interface for customizing the bar in its own settings.
I do think it should’ve been given a lot more love, but that’s Apple for ya I guess
I sure did prefer the media controls on it, though. I still have a 16” here and am reminded of what could have been.
I honestly think it was mostly a "we have a custom secure coprocessor now, what can we do with it?" sort of thing, which also worked out for Touch ID and disk encryption.