Time ago, I suggested a new Gold Saucer floor based on the Serendipity area from Final Fantasy XIII-2. [link]
Now I have an idea for this new Serendipity-like area: A fortuneteller. A woman who would see our future... in the dungeons. Let me explain.
When you talk to her, a window similar to the duty finder will appear, with all dungeons, trials, and raids. When selecting one, the woman will tell "your future" there, or better said: a tip related with the duty. Each duty would have 3 tips, each one telling you about a strat for a boss attack, or maybe another dungeon puzzle: like read the note at Sastasha to know the right colour.
I think this would be good for newest duties. For people who doesn't want to watch guide videos, but doesn't want to go completely blind, so they can listen three tips from this fortuneteller. Obviously, her tips should have a touch of mystery.