A new design direction, can be many things.
I expect it to mean that they have changed the management of the air the FW is moving. They will push it around in a different way, in a way that better benefits the rest of the car.
It's like the change and move to outwash end plates to push air around the tyre. That was a change in design direction. The number of flaps and their AoA would be another.
If there is a change to the brakeducts too as mooted then I would anticipate this is a reaction to the changes in the new FW.
A bendy wing to me is more of a structural change than a design direction.