We do need more Gil sinks, but not to replace anima. SE already stated the purpose behind Anima is to help players quickly group, or regroup in emergency situations, where players can quickly respond to party invites or event invites. The Anima system is for casual players who don't have enough time on there hands to get from point A to point B and do the specified event. When other means of transportation become available players dependency on anima will reduce. Until then of course your going to feel like it fills too slowly, because that's how it was planned to work with the other forms of transportation included as options.