Nothing wrong with Dragon.
It's an awesome addition to have the new Concept.
The problem, as is with most (though certainly not all), is the Players.
It's Binary, and Simple. Do you take extra Move Speed out of Combat... or allow your Enemy to have it? Do you take extra Out of Combat Regen on BOTH Health and Mana... or allow your Enemy to have it?
Obviously, some Dragons are more worth risking a Failed Defense for than others. But that's okay, every Dragon isn't a point to contend.
Players need to understand that allowing the Out of Combat Move Speed to the Enemy just allows them to flow, rotate and them off easier. Then they wonder why they keep getting caught out... well, those genius people gave a free Move Speed Boost to flank and engage with. Duh.
I know you aren't complaining about Dragons, and that you understand it's the Players really at fault... hopefully through Dynamic Queue more of us can work together with like-minded Players that actually understand Strategy and working together.