Here's one suggestion he's got I concur with:
Stormtrooper accuracyWhy: The stormtroopers throughout the movie prove to be extremely inaccurate when shooting, which seems strange as they have the best weaponry and training the galaxy has to offer.
How: Include a shot where a stormtrooper hits Chewbacca, but not causing any injury because of the Wookiee natural physical strength. Have Chewie look down on his wound – his arm or lower torso or something – and give a growl, followed by him shooting the stormtrooper that hit him.
Why not have the Stormtrooper hit 3P0 and ricochet into the right wall, with Chewy turning around and hitting the Stormtrooper? Even a little bit of accuracy would heighten the tension.