exhard:
My understanding is that the idea behind CD NPA is to try and make the execution of these as similar as possible to an ILS. Hence the use of a CDA, a DA and the lack of a level flight segment prior to the MAP. Although I agree that the use of a CD is beneficial, even if you plan to fly level at the MDA, I really can't see the point of this level flight towards the MAPt (unless circling). It seems to invite the pilot to spot the threshold at a later stage than normal and then make a dive towards the runway. We all know what that can lead to.
No approving authority in its right mind would permit treating MDA as a DA and also approve a level off.