HG code should remain as AB does not have traffic rights for AT-UAE.
The unscheduled stops should be minimized now as they are exclusivley using the D-ABNJ A320 with Sharklets which gives them a better range instead of the older OE-LEL without sharklets. I guess only in winter season in case of stronger headwinds there might be one or the other unscheduled stop in OTP or CND.
In Y you will not notice much difference between a A320 and A330.