Hi 411A I've left a PM.
Most MAP's are very close to the runway threshold. If you do a Dive and Drive approach you dive to around 500ft agl (typical NPA MDA) and then drive towards the MAP peering out of the window for a sight of the runway. You see it and and dive towards the runway, with a potentially dangerous rate of descent, risk landing deep and running out of runway.
What's the difference if your stop watch timed CDA NPA leaves you slightly higher than the ideal profile so you only see the runway at your DA (MDA + 50?) just before your MAP?
I would suggest that both crews should GA from that position.