Those are really old arrangements sadly and are no longer in print so I doubt sadly SE will ever even consider adding them to ARR, even taking into account a while ago they stated due to copyright issues (because Uematsu owns the copyright on most of his work and no longer is directly employed by SE), it's actually not simple to add past FF game's music into ARR, and especially when it comes to arranged music that is not arranged by Soken:

Quote Originally Posted by Cherzy
Adding songs from other FINAL FANTASY games
It's difficult for us to add songs that are not used in FFXIV, but it might be possible to add these in as optional items.
Of course that isn't confirming or stating "no" that they never will appear, but given that was stated eight years ago and there hasn't been anything more on that, I doubt it is something they're going to look at I'm sorry to say.