Hmmm... I don't want to be rude, but... you aren't exactly factually correct.
A Parrot... is a parrot. This is what a Parrot looks like:
The bird in the Seagull Hat to which you refer is a Seagull. This is what a Seagull looks like:
Yes, these two are both BIRDS. I understand that part of your argument. But voting for a "Parrot" is not voting for a "Seagull." It's like saying that there was this poll about "What's your favorite Pixar character?"
Let's say one of the answers was Mike from Monster's Inc. Does this mean that they are going to release Stitch Hats in the game because he's a monster/alien like Mike? Not exactly...
Also, the Pirate Pin Packs are being sold on a regular basis in the parks. And from what I hear, the Hosts gave out the Seagull Hats last night to the winners of the Pirate/Princess Trivia Game. Seeing as there were only a handful of winners, I do not see this as a "mass release."