Uplinker
+1
In any normal aircraft, you have three potential inputs (Capt, FO, AP) that move 2 interconnected control yolks.
On an AB, you have the same three, two of which move only their own sidesticks, and one acting in the blind. Actually all three are acting in the blind as you can't see what the other pilot is doing unless you take your eyes off the runway ahead of you.
On AB with the AP off, actually the AP is still on, in mode called attitude hold or control stick steering in other aircraft. Where ever the aircraft is pointed in pitch and roll, the aircraft tries to maintain those positions. If a gust hits you and tries to roll the aircraft, the flight control computers put roll input to try to maintain your angle of bank. Unfortunately AB decided not to communicate this to you. If you input roll command as well, the aircraft might already be at the control stops, hence, no reaction from the aircraft.
The same with your flying partner. If the aircraft hits a roll gust, he will input roll command to the stick, and you can't see it either. Hence the "dual input", and/or "priority left".
AB does great in gusty conditions, you just have to get used to it.