Almost every single star wars vehicle hasbro has put out is under scaled. Including the barge, which is also very very under scaled.
Even something already small like a speeder bike is somewhat under scaled. Its about balancing cost, space and playability. As well as scaling with ther other vehicles (which are not one uniform scale. A speeder bike is less under scaled than the sail barge is)
On the big Millennium falcon for example, the figures are bigger than the doorways. Its very under scaled as well.
The reason they don't often feel so sma is because they're generally just big enough to feel big enough. Especially in comparison to other vehicles.
