Nothing yet.
For the rear:
Last year we installed some dual-rate springs in the back, that should take care of the bottoming out issue. The lower links have been extended to help soften up the ride and the 3-link modified to allow more droop.
I picked up some 14" travel remote reservoir shocks that will need to be installed along with some limiting straps so the springs won't fall out. Then add some bracing to the rear axle, possibly replace the upper 3 link with a triangulated 4 link setup.
For the front:
Switch to one-piece hubs from a Vitara.
Possible Plans:
Looking into what can be done internally to beef up the rear axle. We'll see what we end up with.