I think we should replace Grizzly model with something that looks more like a Rhino. I mean, model isn't bad, but it doesn't really fit the Liberty line - making a bit different color scheme would help a bit.
Why shouldn't we introduce such as vessel as well?
I wouldn't want a huge saucer on my ship, especially if it is unnecessary. Irl, that thing might block hits (which transports aren't made to withstand, they are civilian ships), but ifl, it would just suck them in.
It might, however, be a special LSF ship with an enormous radar that can detect someone cutting a baguette a thousand light years away (with an obligatory faster-than-light signal; it's possible, theoretically, and has something to do with spins of electrons and positrons, or so I have heard).