What is the INTENDED role of the advanced? And what fix would serve best to archive its role?
Maybe a combination of giving the non-uniques an elite upgrade slot (just like the X-Wings have a droid-slot), then we make the advanced cheaper by one point and the we add a system upgrade slot. If its role is to be 'better' then other starfighters, then this would be the solution....
Just making it 2 points cheaper don't make the Advance better - you may add concussion missiles on your squad of 4 storms - this would make them stronger. But in the end its not much of a difference.
I think a system upgrade slot would serve best, maybe together with a discount of 1 point.