That’s the thing - while as kids we had a few citadel spacefarer figs, what we really wanted were those 15mm figs in the box set. You can do Traveller in 28mm but I suspect the core target public would support 15mm.
Also, Traveller isn’t all about Naval boarding actions, there’s salvage, hijack to name but two and for me it’s far more a paramilitary game of ex service characters than regulars.
A different figure mix - smaller forces with Vargr & Aslan there from the off would have got my attention