The main problem with the Rebels is that the movies make it seem that the Rebels made their own ships. Like when they started, they made a whole bunch of X-Wings, a whole bunch of Y-Wings, a whole bunch of those clamshell transports and a few Corvettes. But it really wouldn't be that way. Showing a conglomeration of ships would just make the rebels seem more realistic. They're not like one big military faction. They're pieced together by many different races and planets, so their fleet should reflect that.