Yeah, I think it could use 2-3 degrees upthrust. The thrustline is above both the CG and all the drag. That'll also help pop it up on step.

Do the plans also call for 5-6 degrees right thrust on the right engine, and 0-1 degree LEFT thrust on the left engine?

Clever throttle stop on your transmitter. I suppose you can't use one of those adjustable-length throttle arms that come with hitec servos?