Funny...I just watched a HOD video and he was saying the same thing when it comes to pvp...you can't whip someone off, they can't be bola's... a plant species y can trap a quetzal but not a griffin.
You can shoot from them, pick with them, and do a dive attack to do damage or outrun any flier.
They can not be headshot for increased damage like an argy.
They have a pretty insane healthpool...and during a dive can attack on the way down dealing massive damage multiple times if you can hit multiple times you will murder anything in the air.