Right now if you pull out of a dive your dragon just slows down all the way again, which if the flight is based on realism, SHOULDNT happen.
Let dragons gain speed from diving because it's realistic, and opens up a lot of PvP and just PvE fun possibilities.
Of course let dragons have their limits, for instance, shadowscales, Biolumins, ect. dive WAY faster, but a big bulky dragon like Flame stalker or Inferno, may not dive as fast but can keep that dive momentum and speed boost longer. I think it would overall be a good edition to the game because the flight system although showing potential is a bit boring once mastered.....
PLUS let's be real, who wouldn't want to zoom?