I agree. Dungeons are becoming a bit too linear and simple.

Now a days it's walk ahead, fight a boss in a circular area, and repeat 2 more times.

I miss open areas and branching pathways (like cutters cry) that are more similar to classic FF dungeons. And what happened to the puzzles? The scale / stone tablets puzzle from sunken temple is one of my favorites.
We need more things than make you think instead of just run ahead and kill stuff.