Hi vilas,
I'm just guessing - but have you noticed the change to Vref on the newer aircraft?
If you look at QRH PER A Speeds and compare 320NEO with 320CEO, weight for weight GD speeds are almost identical but VREF speeds are higher on the NEO and remain at 116 kts for weights below 50 tons. (I guess for VMCL reasons)
I thought there may be a similar problem with pitch / power couple control at light weights and low VREFs during the GA with loss of one Elevator. I guessed the guidance was to limit the pitch to 15 degs NU and accept the increase in speed.