My t6.1 just has tons of steering is its only fault. I've worked on a setup for highbite clay if you want it. Could be my radio settings and driving style though. But other than that its a great truck and is super adjustable.
AE's kit setups are usually pretty bad I didn't bother with the t6.1, b74 and b6.1 but the b6.2 is close to what a lot of us run.
Petitrc is a great place to look for setups, and check AE's site under manuals for which ever car you're looking for as well.
A lot of people over look tires too much. If you aren't generating traction then a setup wont do you any good. Look at what the local fast guys are doing and ask them for help.