But look at their opposition, the PCs.
Please yes.Once more with feeling: I would prefer that dragons be terrifying combatants, yep, but also that they have specific, tailored um, 'dragony' abilities. Supernatural powers and effects above and beyond 'fear aura' and the other usual suspects, such as they are. And this goes for other monsters, too. I'd love for them to be highly distinct, customised, that kind of thing.