Do you have any evidence of SE not maintaining one of their mainline FF games on iOS? Looking at their update history pretty much everything has gotten updates, and recently too. Every one of my FF games runs on my iPhone, have been updated to 64bit, most have had cloud saves added and had some sort of widescreen retina enhancements added, not to mention controller support. I'm really pleased with their commitment to iOS and mobile.I wish we've got this version on Vita, with the touch menus optional, it would be awesome!.
But I don't trust square to maintain this in two iOS updates :S to get it on mobile.