.....You're missing the faux vents on the bonnet ... them in orange would remove that odd section of where there's nothing.
The faux bonnet vents would not just be a challenge to do...they're nigh on
impossible to do...too many 'edges' to fit the vinyl around....heat gun or not.
If you did fancy doing them, then personally I'd spray them to match.
And re-thinking re the door top edges...nah ! It wouldn't line up with the
front 'vanes'. But...if you did go ahead and spray the faux bonnet vents
(I have a pair I removed), then I'd consider masking up either side of the
creases/slots/swage lines in the doors, and spray them orange...as you
originally were thinking of doing.
And I have a feeling that
maybe...just maybe, that if you 'fly-eye'
the roof orange then you will have defeated the object of using the colour
to add 'highlights' to the car. (sorry to disagree with you
airSnake)