These dragons just don't look right when they're flying in slow mode. I'd like to make a suggestion to make them a bit more immersive:

I'd like to see them only be able to climb when the sprint key is pressed, and soar/glide like the Rock Drake when they're not sprinting.

I really think this is how ALL flying creatures should work when you come down to it. Large birds in the real world spend as much time gliding as possible, only flapping their wings when they really have to.