Monroville said:

I say get rid of the tree traps and replace them with pits and the like. Trees can still be a factor - Scout Walker steps into a pit; as Scout Walker's leg sinks down halfway, ground starts to cave ala a sinkhole; as the rest sinks in, the trees on either side topple over on top of the SW, crushing and blowing it up.

I still say give the Ewoks something explosive to account for getting through the Stormtrooper armor - be it explosive arrow heads and bolas. Maybe even having a scene where one Ewok raises his hand and we see retractable claws pop out and THEN he jumps on top of the Stormtrooper, followed by other Ewoks. Blood wouldn't have to be shown, though some nice tearing and squishing sounds could be used ala AMERICAN WEREWOLF or something to get the idea across. Remember that Koalas are pretty damn cute too, but have sharp claws for climbing trees and can get pretty pissed off.

The idea is that these are primitive creatures fighting advanced tech. Sticks and stones versus hi-tech. That was the whole point Lucas went with them instead of the original Wookies.