So far i haven't had much problemes getting dragon kills. Of course i'm not farming them so that's that. On PvP server it's pretty sweet. You PvP while waiting for a dragon to spawn and when the dragon is UP, join a random raid (or smaller groupes) and have fun trying to wipe the other raids (bombs on ennemies MTs is hilarious). Even with completely unorganized, PuG raids, you still get your dragon kill while having fun (and not just zerging that poor flying lizard).
By the way, i've heard there was Dragon spawns in Commons aswell. If that's true it shouldn't be hard to get to an instance when two dragons are on.
The only issue i'm having with this world boss is the murder points. With some classes it's impossible to avoid getting them even if you watch out for lowbies. Would be nice if murder points where disabled in the zone the world boss spawns.