to build better looking wheels;
hubcaps should be two plates high and only one long, if you have the brick pack that give you those special two-way ramps you can use them to cap off the wheels giving it a rounder and cleaner look than what you currently have.
I recommend adding some girth/beef/thickness to the floor of the jeep too as it just look like a piece of sheet metal with no chassis
other wise it looks nice, keep at it