The TT is really a Yeti underneath. Has all the same suspension components. For all intents and purposes only the body and cage are different. Everything underneath is Yeti. So when buying stuff like chassis and suspension stuff, you can just get Yeti parts. It works, I've done it. So even if you end up not liking the TT, converting it to a yeti would be easy.
Personally I LOVE Trophy Trucks. Always have. I was going to build my own, like so many others have, but when I saw the Score TT release, I immediately got one as soon as it came out. I frickin love it. It handles just like the real thing, it's amazing. There are not a lot of hop-ups for it yet, because it's so new. BUT, like I said, it's a yeti underneath, and there's a crap-ton of stuff available for that already. I've bought Yeti suspension, bumpers, and skid plates, and it all fit perfectly.
As for it crawling rocks, sure, does it just fine. Not as good as a regular Yeti, but that's only due to the body and overhangs. The Yeti doesn't have a rear overhang, the Score TT does. That's really the only issue. Front bumpers and overhangs are the same. If you want to crawl, leave the stock pinion in. If you want fast, throw in a 20T pinion, which is darn near ideal for the truck. It still has stupid amounts of torque, but likely not as controllable in really slow rocky conditions than the shorter stock pinion. Feel free to PM me with any other Q's.