It might be worth checking if its just an animation issue. If you go into the external cam and closely watch the control surfaces, are they too lagging behind or are they following pretty closely to your inputs? It might be better to test this on a GA like the C172 that has cable connected control surfaces. The airliners are fly-by-wire and can subject your inputs to processing like smoothing or damping. They also use hydraulics to move the control surfaces which might limit their rapid large input responsiveness, if that’s what you’re using to test.
If it doesn’t happen on the 172 but it does on the A320N, it could just be the control processing I was talking about earlier. This page has some interesting information about the A320’s PFCs
“For safety matters, the proc-essing of signals by the flight control computers use pre-set limitations and instructions called laws. This means that pre-scribed limitations can not be exceeded.”
Since you say that the controls seem to change as you accelerate, could that be a result of the aircraft applying its limitations to stop you from making large abrupt control inputs now that you have enough airspeed for them to take affect?
Note that I’m not talking about the throttle responsiveness here, which as others have noticed too, is definitely limited. My guess is they did that because A) IRL its bad practice to slam it forward extremely fast or B) they didn’t want to have to model the engine cough when you do slam it forward. Yea they could just let you move it as fast as possible and still not model the engine cough but, they didn’t. Either way it is kind of annoying but, honestly how much does it really take away from the experience? The control surface input lag is ALOT more detrimental IMO.
just mah 2 cents