Have to say that the A/THR on the 320 and 321 is usually excellent. The 'phase change' available by nudging the thrust levers forward out of the detent also works very well as mentioned earlier. G/S Mini also an excellent tool normally.
Having flown both beasts in some interesting typhoon & windshear conditions around here (both at Kai Tak and CLK) I have found that in extremis there can be a large pitch power oscillatory couple build up and in such circumstances manual thrust and setting an average thrust results in a much more stable approach.
Although I have never had cause to use the thrust manually by force (only by choice), come the day it's a bit too late to (re)learn how sensitive it is....much better to keep up the practice IMHO.