Interplanetary shuttle from FE2- the one without a hyperdrive - just kidding. Of course now that we have in system missions it's no longer completely useless.
What I'd really like to see would be some more intermediate traders like the tiger etc. or maybe some new ships class to do something other than fighting or trading. We know there are going to be passenger ships, but how about fast couriers or miners or something we don't yet know about.
I'm not too keen on ships like the falcon or the kestrel unless they make some changes to them. I wouldn't want to see want any clunkers put in just to make up the numbers.