Touch input delay (Input lag) and acceleration

when I move the screen, I feel that the control is delayed, in addition, at different speeds of finger movement on the screen, the sensitivity changes, that is, acceleration works.

About input lag: I tested this with Vsync on and off, with Vsync on the input lag is reduced but still present (in the video Vsync is off).

About the acceleration of sensitivity: I understand that this is done to please the players, but for some players it really bothers them, It would be nice if they added a switch for this sensitivity acceleration.