Honestly who cares? If they ask you and you don’t want it just be polite and say “no thanks”
On the a320, In my experience on newly built aircraft, the autothrust responds very slowly at low / intermediate thrust settings and in managed speed will quite often hover at the speed target - 2 or 3 knots.
I have seen this on approach fully configured with the speed staying a bit below commanded Vapp. In this case I will ask for the Vapp to be increased by a few knots so the aircraft is flying at the speed it’s supposed to be at. I’d rather be a bit fast than a bit slow. Just big picture stuff. And no, unless the LDA is limiting I wouldn’t recalculate anything. (,”)