You need some PA terrain my friend! We've got plenty of big rocks, mud, and terrain to keep those crawlers busy. But I know what you are saying, been wheeling solid axle rigs since 2008 or so and honestly I'm a bit bored with them. They are so capable anymore, it's not much of a challenge.
It's been fun messing with it for sure. The 4x4 platform has all kinds of options - 3 different widths, 3 WB's, HCG, LCG, etc. and so far it's been very durable. They are 1.9 SSD's with stock hubs and 2wd 'pede front hexes...just a bit wider than stock. There's enough offset baked into the rims that they just clear.
Agreed it's fun to re-purpose vehicles... I've done quite a few now, some more successful than others.