I finding that only using LT, light feathering of the RS, and not smothering the player to be pretty successful for me. They don't slide around as much. I use the fast shuffle only when they're driving to the basket. I've been mostly impressed with the defense. Plus, it helps that every dribble drive and/or late shot attempts doesn't result in a foul.
I've been keeping up with the higher FG% by playing solid defense and limiting my turnovers.