Falcom has never focused on graphics, from what I've seen. Plot (as simplistic as they can be), music, and especially gameplay always come first. Like said, Falcom isn't a AAA studio, either.
The Ys games I've played are... well, almost all of them. I & II Chronicles, Oath in Felghana, Ark of Napishtim, Origin, Seven, Memories of Celceta, Wanderers, Mask of the Sun, Kefin, etc. There are some I still need to play, but a new Ys game is always a welcome thing because they're easily some of my favorite games.