There are a few basic upgrades you can add to vastly improve this model, the first of which is adding an armored cover to the driver's hatch.
I've built two Paladins, one from Ft. Sill, and one from Ft. Hood, and there are differences.
The latch for the left side hatch is on top on one version, and on the side on the other. There's also a difference in the pattern of the no-slip texture. I'm currently stuck at YPG so I can't remember which version had which location, but I looked at enough at each post to conclude that the differences were indeed consistent within thier respective installations.
Another mistake in the kit which is the same on all Paladins I've seen is the stowage boxes on the back. They are NOT the two long ones used in the original Italeri kit, although those parts can be used as a basis for the new boxes. You'll also need to add the auxiliary door lock at the rear, missing in the kit.
The recuperator housing needs a ot of little bolts and gussets added to it, as well as a scratch built chronograph mount. The comander's gun mount and ring needs a lot of TLC as well.
Lastly (again, apologies as this is all off the top of my head) the hatch on the left front turret has a raised edge. It needs to be sanded off and scribed in.
Hopefully while I'm here I can get some good photos of the Crusader, which they've got under a large cammo net right now.