maxxcrawler,
Don't get me wrong...I'm on your side...I have an E-Maxx and would love to turn it into a crawler. I think it can be done, because of all the power and it's sheer size. However, you would have more FUN doing is with something with solid axles. Articulation ins't everything.
That said, the E-Maxx sucks in articulation. When I saw your first pic, I said "whoah! How did he do that with an E-Maxx???", but then I saw your other front tire was off the ground...a lot. My TLT could do the same thing (adjust for scale) with all tires on the ground. Behold:
Since the truck's articulation kinda sucks, what I would focus on would be (and take this with a grain of salt...I am no crawling expert):
1. Center of Gravity.
2. Gear ration (lower!)
3. Get rid of the EVX or dump one motor. That ESC goes from 0 to fast with little in between.
4. Tires...softer and grippier.
I think it would make a good crawler. I for one would love to see someone do it without changing the whole thing around radically.
I personally find my E-Maxx dull...because it either can crawl over something (most things) with sheer power or it flips over. There seems to be no in between with that truck. That's why COG would be the most important upgrade, IMHO.
Good luck!