Thread was started Nandatte about the warp costing 0 anima and 15 minutes recast and asking if players feel 15 minutes is too long or should of been like current (old way), in the thread some asked why does it need to be 15 minutes, and it doesn't help the crafters delivering to the NPC's for local levels.

Here's reps response.

Original Thread Link: http://forum.square-enix.com/ffxiv/threads/16333

Quote Originally Posted by Triairy View Post
皆さん、こんにちは。
Hello Everyone, (Minasan = everyone)

デジョンのリキャストタイムについて開発チームと確認してきました。 デジョンのリキャストタイムを15分に設定した理由としては、少し遠出をしたときなど、1回の遊びを15分くらいと想定しており、街中や近場のキャンプ間 などでの使用は想定していないためです。
Checked with the dev team regarding the recast time on warp. The reason 15 minutes was set as recast time is because this should be used when you travel far and figured 15min per cast is about right, we didn't set this for within city or near by camps.