But did they forget to add a new quest completion jingle? There's a new acceptance one, but completion plays the same sound as it did in Stormblood, which is especially awkward given that it uses part of the main theme from that expansion.
The SB2 quest completion jingle IS different, and actually borrows from part of the music you hear in the Crystarium (which in turn might be taken from something else, not sure), not the Ala Mhigan anthem. The snippets borrowed from each do sound roughly familiar, though.