maybe artoo could be giving holographic projections too? what if the ewok army was to be like zulu, with a guy at the back waving a spear, then a load of ewoks get shot willing just to count the guns? basically head ewok stands at the back with the droids to direct tactically.
what if all the initial scout troopers are unusually jumpy and spooked about something, so they are really easily jumped by the rebels, as if the imperials are more interested in surviving the teddy wrath than the job at hand.
would it be worth giving the ewoks a more pygmy look, blowpipes, shrunken heads, piercings, green camo etc? opening of raiders of the lost ark would be a good example.