I finally test drove the RC after having it in pieces for a few weeks and there has definitely been an improvement in crawling abilities. Right now I am on a suspension setup with a shock angle of 35 degrees which theoretically increases suspension travel by 3.3mm over stock, and -4mm of vertical offset to increase travel in extension. There is some rubbing from the front tires when in full compression and steering fully locked to one side. 

One thing that helped greatly is adding a limiting strap between the front axle and chassis; this limits how far the front end will lift on an incline, but still lets the front axle flex fully. I also increased the preload in the rear to help the front tires grab traction earlier on inclines. It's a little hard to tell from the picture but I looped a piece of kevlar string under the center diff links and between the battery tray and front shock mount. 

As of right now I only have the rear magnetic body mount. I am keeping the stock front body mount attached to the body, and removed the screws that fasten it to the chassis. This lets me slide the front of the body into the frame, and the rear magnet locks it in place. For now this works extremely well, but I am still trying to design a proper front mount. The only reason I won't be keeping this setup is because I want to try experimenting with lifting both the body and bumpers to hopefully get some better tire clearance. I already have an idea for an adjustable rear mount, but the front will be a little tricky.

So far I have magnet mount for the body that slides under the hood area, but there isn't anything securing it in place. I am trying to incorporate some set screws to the underside and see how that does. The front bumper mount is a little more difficult to reverse engineer than the rear so I'm expecting some trial and error before everything fits together cleanly.