The porpoising seen so far is the cars squatting like a dog and bouncing up again and then going down again the fronts seem to just not have that.much downforce so the ground effect, floor flexing and rear suspension are all at play. Whether its floor flexing and hitting the ground or the suspension I don't know. One thing that has been seen is tie structures added to stabilise the floor edges and ferrari have certainly improved from it. If someone puts a front tyre into another drivers side floor they will get cut to ribbons on the tyre but floor damage looks to be utterly terminal issue now. There's a lot of tracks with Kerbs after that are severe. They could well be car killers to go near. It's going to be interesting this season. Smooth and consistent wins imo.