Madfox,
The points you raise you make me think that CDG could be a very valuable feat as part of a planned team tactic: Cleric casts Hold Person/Monster; delayed Fighter with Mobility rushes in and delivers the Power Attack Death Blow.
At low levels, combats drag out because everyone misses a lot. Plus those Hold Person spells use a valuable 2nd level slot so you need to make the most of it. You need to act quickly because the spell does not last long.
At medium or higher levels, that Grunt you Held is going to be backed up by a spellcaster who can Remove Paralysis or Dispel Magic. Delay half a round and you lose your opportunity for the easy kill.
I haven't had much experience with choosing feats as part of a team plan. We usually pick based on individual character concept. A pair of us are trying out Blind Fight; I think we can cause some real havoc together.