Y's is good but that is an action RPG. However you would definitely be able to finish it. Took me about 20-25 hours to beat and that was with exploring most of the map.
Chrono Cross is highly regarded arounf here and while not exactly similar to FF10 or 7. It seems to be the best sort of ground for you. Since you probably prefer Turn Based Combat.
Chrono Trigger you're better off getting on DS or playing anywhere else. The PS1 version is a last resort.
Can't say much about Atelier but from what little I have played. The game relies heavily on a time mechanic. That has you focusing on certain tasks until you have used them up for the ingame day time. Someone should do better in explaining it.
Well observed, that is correct.