well I'd just stick with your ESC for now. If it craps out later than you can just replace it, unless the slowing down thing is really bugging you. As for the T3 you should mount the shocks in the position that gives the highest ride height, you should install some preload spacers, Also installing larger diameter tires would give you some more ground clearance. If all that doesn't help enough, you could always install larger shocks, so long as they still fit, in other words don't try to mount savage or LST shocks, maybe something like maxx shocks.