Characters that aspire to be more than a bunch of Jar Jar Binks, or Anikan "a barrel roll is a good trick" skywalker.
No children, and just to be sure make all the characters above the age of 25.
A plot that doesn't consist of saving the world.
An open non-linear world.
A male character that isn't feminine, or a female character that isn't masculine. It seems most main characters are either male and angsty woe-is-me-I'm-too-depressed-and-self-absorbed-to-realize-this-walking-sex-doll-with-massive-boobs-wants-to-have-my-children, or female and miserable cunts I'm-too-busy-being-tough-and-independent-to-be-resemble-a-real-character-would-rather-kick-your-nuts-than-appear-believable.
Which brings the better point, no angst, no chocobos, create a game outside the Ivalice universe.
Less Jerkoff material and stupid wardrobes
Characters that aren't brain dead and borderline retarded (I'm looking at you Vanille)
Characters that aren't insufferable annoying pussies (I'm looking at you Hope, you make Shinji Ikari look manly and decisive)
Ditch turn-based combat, ditch the aspirations of making a soap opera, or some deep cinematic masterpiece - no one working on the project has the skills to make it so.
Focus on exploration and atmosphere, minimal story telling - let the player piece it together.
In essence make a game for adults, not otaku and simpletons.
This might anger some people but fuck it, let a non Japanese studio control the franchise, the series is in decline and dying because Square is creatively dead and blind to innovation and good game design.