Due to a plane swap, I just had my second agonizing experience on this Hell-Plane.
I wish i had packed a tape measure, to confirm my observations.
I was in 21A, which may be worse than all the other E+ seats besides 21F.
The height of the seat bottom from the floor is lower than the normal Airbii, and a consequence of this is that your thighs are not parallel to the floor, instead, they angle up, and this is quite uncomfortable.
Second, the level of the tray table and most importantly the arm rests are too low to comfortably settle into the seat.
Why they are 'selling' the 'more headroom' angle, when there are very few 9 foot tall folks flying,a nd needing the extra space i dont know...
