IMO, I think people are vastly underestimating the amount of fighters that are going to be needed to protect their capital ships. Imperials will probably have to allocate about 100pts for fighters, a 2 to 1 advantage in numbers will be needed. Look at B-Wings, you will be taking 6 black dice if three of them get past your screen. Rebels will probably have to do the same, their fighters have the punch to really hurt Imperial ships
My ideal fighter screen will be about 8 Tie fighters, 2 - 4 Interceptors and 4 Tie bombers on the Imperial side (not including Characters).
6 X-Wings, 4 A-Wings and 4 B-Wings for the Rebels.