I've been thinking about Final Fantasy XIII a lot recently, mostly about how much better it could be if the story and gameplay were changed around a little.
Here are some changes I thought of:
Change #1: The Battle System is no longer full of paradigms and staggering; instead it requires you to pick the party members' actions and attack monsters until their HP goes down to zero without having to juggle them like a fool.
Change #2: MP is back, and you will have to keep track of the party's HP and MP after battle with ethers, potions, and white magic.
Change #3: No more Game Overs if your "party leader" dies. Getting a Game Over will require you to reload the game from your last save point.
Change #4: Vanille's the main character and she uses a machine gun instead of that weird fishing pole. Also,
less moaning in battle. (She IS the game's narrator, and it has been stated by the game's creators that she isn't the main character only because Lightning was in the tech demo trailer. Like if Tidus wasn't the main character of FFX because Lulu was shown first or something like that. She may be annoying, but she does have more to do with the story than Ms. Punches People.)
Change #5: Conversations between party members are now confined in the same scene instead of Sazh asking Vanille a question and then Vanille answering him 15 minutes later.
Change #6: Summons are useful again, and do a quick and powerful attack on all of your enemies. If the stagger system is still around, they immediately stagger all the monsters and then disappear.
Change #7: A world map that has towns on it. The townspeople won't mind the L'Cie, they're all hiding their tattoos in their gloves and cleavage and thighs and whatnot. You'll also get an airship when Cid lets you on the Lindblum.
Change #8: If the areas the party walks through are still tubular, the player will have the choice to ride an Eidolon in vehicle mode down the Tube.
Change #9: More gil and better shops. You can also find better weapons in treasure chests instead of buying them with your behemoth claws and microchips.
Change #10: The twist at Chapter 9 isn't, "Hey, you're actually supposed to destroy Cocoon, and also I'm here to help you grind so you're strong enough," it's actually, "Hey, you're actually supposed to destroy Cocoon, and I'm not cool with that."
Change #11: Lightning has a much less serious personality and uses more of those gravity devices to reach places with treasure chests in them.
Change #12: Fighting monsters at the beginning actually gives you experience points as opposed to not getting them (If you don't have a "Crystarium" they'll still be there to spend when you finally do get it), and the story is presented to us from the beginning as opposed to starting in media res and being told to us in flashbacks.
Change #13: FFXIII's original ending has Deus Ex Machina in it, bodaciously, a goddess comes by and solves every problem the main characters possibly have. The new ending will not have that; instead, the main characters either fight Ragnarok to prevent it from killing Orphan and Cocoon (becoming crystals because Serah could also do that after she chose to disobey her Fal'Cie), or the main characters kill Orphan and have to fight off that Creator thingy the Fal'Cie are so hyped about.