Machinations is an ARR theme by Masayoshi Soken though, not 1.0 (1.0 music was mostly Nobuo Uematsu's work).

Reuse of earlier tracks is basically expected though - this is not a new game, but an expansion, a continuation of the game, so of course earlier music is going to return, where and when it's appropriate. It should go without saying though that new tracks should take priority, but why create a whole new track when an earlier one fits the theme? (Also, to be fair to Soken, the guy is in remission from lung cancer so it's probably taking him longer to get back into full time composing).