There's a lot of technical explanation of various techniques here, but I think it can be boiled down to a couple of points.
1. A stable, constant-angle approach is safer, and is standard procedure for all large-aircraft operators..
2. There is little to be gained from flying level at MDA to the MAP - and it's potentially very dangerous if you decide to dive for the runway once you see it. Bear in mind you have visibility/RVR limits for a reason!
3. Decide what you're going to do, brief it and then fly it. Don't make your plan up as you go along, and don't change a good plan.
Scroggs