Yep, the 1st thing I did when I got my 011 about 2 years ago was replace those tired-assed, yellowing headlight assemblies with new ones, and installed all LED bulbs in them...
But since the rear light fixtures were in good shape, I just replaced the old bulbs with LED's too, and both of them made a huge difference in the available lighting power, as well as the appearance improvement..
I have not done any other mods like lifts or whatnot, but I did put some new 20" Wrangler ATS's on it recently, because it does what I need it to do just fine otherwise....