I think what you did here is a solid start. The Hawk's dial, while "distinct", really is its biggest weakness. In my experience crew like Nien Numb and Hera often get slotted in just to compensate for the dial. I also think Scum Hawks tend to be more slightly more viable partly because of the added utility the Illicit slot can give it. I chewed on what you did for a while and came up with the following additions below.
For the Retrofit, I added the reduction in mod cost so things like Engine Upgrade and Vectored Thrusters could get added on more cheaply to compensate for its mobility issues.
The new Rebel ELINT title I created gives the Rebel Hawks a bit more oomph. I replaced the stock Target Lock with Coordinate, to provide more utility as a support ship and because I've never seen TL used by anyone flying a HWK (maybe some other folks have, who knows?). I also have it adding a systems slot to give it more options (and partially for thematic reasons).
That's what I've got.