Modern football plays are far more dynamic than ever, if the defense shows man to man then do x, if they show zone do y, if they show blitz Z is the quick target, or if star receiver is mismatched then go deep.

The huddle is about the QB disseminating the play they are about to run - he's the only one allowed to (in pro football) have a radio link to the coach. Not to vote on the play that is about to be run. My guess is feedback about people's physical condition and needing to be pulled from the game is the only feedback allowed (other than a question if they forgot something about the play, I guess?)

The design doc discusses design, the standup aligns the team by discussing the 'play' if you don't mind me elaborating on this analogy.

I lack sufficient football knowledge to carry the analogy much further. My understanding is that there's no real discussion...the play is called by the coach, the QB (I expect) relays the play to the team in the huddle, and they execute it per the playbook that they all study. To be comparable, the standup would be where you get your work assigned for the day.