There is a lot of strong discussion about this subject, but unfortunately between pilots who are on quite different variants of the airbus fleet. Can I suggest when quoting FCOMs that you state the airbus type to stop confusion. To put my two pennyworth in I would have thought having flap 3 for approach (A319) when ALTN Law will change to DCT Law will make the go-around slightly easier. With only manual pitch trim the change from flap 3 to flap 2 should be easier than flap full to flap 3.