Well firstly, there seems no point in imposing this IF there are actually seats available.
But what a poor decision. It seems that pax with confirmed reservations on a full flight will STILL be bumped by the Ops department seeking cheap crewing logistics. It's just that they will now be bumped at the gate rather than when sat on board, and all the media comments about "confirmed" reservations being in truth a lottery still apply. So Dr Dao would still be arbitrarily selected by the gate agent not to travel. And if he objects there about this, then the agent will doubtless STILL send for the "law enforcement", seeing as they are only disallowed now to pull someone from inside the aircraft. Presumably the same thugs will be sent as before, with the same attitudes, and thus Dr Dao will STILL get beaten up and dragged away from the counter by the feet,
Great customer-primacy decision Munoz. Only took you a week to think this one up.