Hey Pete.
Yup, I think a new vest would help with the spacing on the armor... right now everything is much too far appart. Also, the vest is much too long... it should only be about an inch or so below the belly plate.
Other things, do yourself a favor and get the kidney armor and attach it to the codpiece. Right now because you don't have that piece the cod is riding way too low. It looks like its falling off.
Last bit... dirty her up. You're way too clean man! Fett needs to look like he's been slopping around in the dirt and mud. Your jumpsuit should be dirty up to the knees or so and then have some misting of dirt on the thigh pouches. Once that happens it'll pull it all together.
Good luck bud!