Sorry but these numbers are misleading. All three NEVs use the same pictch (1m52 or 61"), which is industry standard. Any traditional lie-flat seat needs to have the pax feet under the head of the pax in front. Whether the seat pitch if 58", 61 or 65, it is the same problem. To have a traditional flat bed (as in First) one needs approx 80". Mathematically, there is no way way to have a lie-flat seat of a length of 1m80 (72") or 2m (80") without an incline of approximately 13°. The 9° and 5° is pure advertising blabla that AF is now careful not too write on its website. I agree that NEV3 is more comfortable than NEV1, but the AVERAGE angle of recline is basically the same, and similar to all traditional lie-flat seat (LH, LX,etc...). The seat is made up of three cushions/parts: foot, bottom (...) and back. Each of the three parts of the seat can take a different angle. In its misleading advertisement AF reported the cushion with the best angle. It is misleading and false advertising.
One could report a 0° angle for an economy seat if using this method: In a Y seat the bottom cushion has a 0° angle, although the foot and back cushions have a steep angle.