As far as niches for new ships are concerned, I could see...
* A large ship with very good vertical and lateral thrust, good jump range, and medium hauling capability.
I've noticed that right now the Cutter is always the best hauler because it has a C7 FSD, and so even if you're hauling less than your max cargo you still jump furthest with a cutter. If they were to release a ship with the C8 FSD, they could make a ship that has less overall cargo but still jumps further than a cutter. Combine this with really good vertical thrust(to make flying in gravity more pleasant) and you could create the ultimate colonization hauler. Not quite as much cargo as a cutter, but makes up for it with handling, jump range, and SCO optimization.
* A small long-range ship with an SFL bay.
Right now there really isn't any particularly good option for this. A Krait, for example, is usually better off omitting the fighter bay and just sticking to fighting on your own, and if you're gonna do that you may as well fly a Corsair instead. I'd love a real purpose-built ship for multicrew, where you can fit a C6 fighter bay and the ship itself is designed to also be effective on its own.
Something like a Vulture Mk2 - maybe a Condor? 2x C6 optionals, then more like a vulture from then on down, with like class 4, 3, 2, 1, 1. Maybe 2x huge hardpoints? That'd be pretty cool. It'd probably have to be a medium, but that doesn't mean it couldn't be relatively small and fly like a small.