Yeah, 7's Piano Collections was a late bloomer. It also has a very different style.
I personally really like that the Piano Collections became more and more technically challenging as the series went on. FFIV and V (outside of Big Bridge, lol) were beginner-intermediate, and there were some pretty awesome workouts in VI. VIII and IX have some technically difficult pieces, and XIII's Piano Collection is... well, yeah.
I personally really like that the Piano Collections became more and more technically challenging as the series went on. FFIV and V (outside of Big Bridge, lol) were beginner-intermediate, and there were some pretty awesome workouts in VI. VIII and IX have some technically difficult pieces, and XIII's Piano Collection is... well, yeah.