While I certainly wouldn't mind new races added to FF14, I can't say the Bangaa would be my first choice.

As far as the use of developmental resource, I think there another angle to look at, as FF11/14 is a bit different than most other MMOs in this regard. To be specific, in 11/14 our characters are not limited to a single class/job, so most player's in-game progression tends to be focused on a single main character, as opposed to multiple characters with different classes like in other MMOs.

This has a direct impact on the utilization of additional playable race added down the road, while they are great for new players, they are likely to see considerably less use amongst the established player base. While it certainly doesn't mean that no new races should be added, it does change the value proposition a bit.