In my Opinion i think its will scale as new content is released, much like in Pokemon games,the world only has 15, pokemon yet now they are up to over 9000. Games can evolve and we should expect that. Just like Allagan gear will be iLvl 95, Maybe when the new content is released and the level cap increased to 60, we will see most items scaled back a few levels.
This is just an example but maybe
AF1 will be iLVL 55
WP will be iLVL 55
AK will be iLVL 60
DL will be iLVL 65
Crystal Tower gear will be iLvL 70
AF+1 will be iLVL 75
Allagan will be iLVL 80

and new armor for level 60 can range in iLVL and the newest end game gear will have the iLVL of 95. If this game plans to have a long life span like FFXI, and they dont rescale then it would be odd at lvl 99 to have iLvl 200 weapons.