You need to look at the venting, the soffet and high vents are really important.
The ridge vent is not much a problem, what are you looking at for soffet vents
Did you build the nee walls out of 2x6 for good depth of insulation.
The sloped part of the ceiling will likely need more room for baffles and enough insulation.
did you solid block between the joists below the nee walls?