First of all I don't see why you'd want to play as an Ewok as you'd be horribly outmatched against the stormtroopers and AT-STs, and secondly it's not possible as the engine only allows one player model size for the whole mod - that is, everyone has to be human-sized.

Did a search and did not find anything about this, but I'm sure it's been tried...

I understood that the reason we can't fly Star destroyers right now is that they are so huge that it taxes the engine.  (hope I'm correct)

Well, Is it possible on vehicle only space maps to use scaled down versions of ships?  That is, to scale down EVERYTHING?

For example, a Star Destroyer at the scale of a Carrack Cruiser, and everything else smaller in proportion.

Then, complexity permitting, might a pilotable Star Destroyer or similar sized ship then be possible?

Imagined Pros:
Flying Star Destroyers

Imagined Cons:
That it would throw off all the effects? ( lasers, explosions, engine glows, altitude readings,  etc)

Fighters would be too tiny to code?

I've got more musings on this, but why bother to type it all if the answer to the first question is "No" right? 

Even so, I'm curious to know what happened if/when you guys explored this.

I would have thought that slower speeds(from the standpoint of the engine) would improve hit detection.  Ah well, ignorance is bliss.