As the years go on and on I'm seeing more and more people getting not only more and more curious about what they missed but they're also seeing this version of the product through thicker and thicker rose tinted glasses.
Now as a person who detested 1.0 so much that they nuked their account that played that version. You can see how this might be... troublesome for me to witness. So this is where my suggestion comes into play here which is basically this:
I think SE should re-release the 1.0 version of FFXIV like WoW did with it's Vanilla version of the product. This way players will be able to experience what they missed out on and stop thinking it was better then it actually was back then. From a business side it'll give you a opportunity to make more money since you'll not have to release any new content for the 1.0 version while asking for users to pay a box-price and subscription for it and thus more profit.
and that's pretty much it, that's my suggestion.
Re-release 1.0 as a "ffxiv classic" deal.