Dragon CR´s too low?

[reapersaurus]

That said, dragons need to be a bit higher, for their shear power alone.

Do they get Exotic Weapon Proficiency: Scissors, and have the Improved Many-Cut feat or somethin'?

he he.

Seriously though, the dragon-CR-is-too-low is a well-documented and common observation about 3E thru the years.
So you're not alone, guys.