Oh man how could i forget
Lufaise meadows is fucking beautiful, and so is both sea and sky too. It would perhaps be a bit over the top to include all those places, but a few (2-3?) different sceneries based on classic FF areas for each town would be a decent amount.
Well, you could always just hold the ceremony out there and take your chances that a bunch of tards wouldn't show up to ruin it. Instance-on-demand sounds cool, but I'm not sure how viable it would be to implement such a thing. It might be a bit much to ask, perhaps. I don't know.
