Because CC doesn't like it its automatically a bad thing.
You know, Ive flown with some guys who have done the 40-30 thing. Someguys just rerun the numbers for 40 and do that. It works. Nothing says you CANT do it... also the SFP thing, its just normal in our 800s so its not discussed.
Also, you (CC) must not have flown into MCO much when they are landing north, going to the east complex and they keep you high and fast and then dump you and say GOOD LUCK! with a 40 knot tailwind at 7000 feet 25 miles from the airport...