You can only place points into the bottom Tier of the AA feats/abilities until you reach level 80, you can't even spend points until you reach level 20.
Then if you look at the fights that you encounter on your way to level 80 and the armor that you can equip as you level, the gain from the AAs aren't going to be game breaking. All you end up with is toons that have the AAs to participate in GS modes (I feel bad for tanks tbh as they still need to get the armor to do their job effectively, but Khitai blues work pretty well in a lot of cases)