Maybe you're looking at this the wrong way - sure, Rebs dont have a carrier like a Quasar with similar upgrade/ alpha strike capabilities, but they do have far more flexible/ useful carrier options when looking at the big picture. The MC80, AF and MC80L (with Leia/Liberty) are all capable of doing other stuff whilst performing carrier duties. The Quasar is great at carrier duties... and thats it. Plus its about as durable as a papier mache U-boat.
Also, the GR75. Of course it doesnt have the alpha strike of the Quasar, but 6 squadron command for 46 points, plus arguably more survivability and the additional activation.