I would have given idea's for mod's before, but it looks good...
What are you looking to improve? durability? proformance/handling? appearance?
Duarbility***I'd get some aluminum shock caps and STRC hinge pins.
Proformace/handling***lower the stance. It looks to be a high-rider.
Appearance***tidy up the wires, and mount your esc on/off switch.
and one of the things I did on my newest (used) trucks, was to switch out all the silver philips head screws with some proper hex heads.
(Here ends the Lesson.)