This post was super helpful; I had many of the same questions. Thanks for going over it!
One thing I must have missed is what point the circular gauge plays. There's the HP and ATB gauges, and then to their left is a gold circular gauge with a number(?) in the middle of it. What is that telling me?
Glad I could help!
That circular gauge is your EP. It goes up to 5 max, and is basically like your special Savior powers. It fills up after every battle you win by values ranging from .3 of a chunk to two chunks (the highest EP payout from a battle I've seen so far), and then you can either use 2 chunks for a skill called overclock, which stops time in the battle and lets you pound an enemy with no worries, or use it on a variety of other skills outside of battle like teleportation around the game world, healing, and stopping the in game clock for a few minutes.
Outside of battle, and after you've worked your way through a bit of the story, you can click triangle or Y and go to your EP abilities section. That shows all the things you can do with it.
If anyone else needs any more help, I can probably answer some early questions. I've mostly wrapped my head around how the game works.
Will my preorder/CE DLC codes work later in the year? I'm replaying the entire series do I probably won't get to LR until the end of the year.
Yeah they'll work for a long while. You might check for an expiration date on the card or something though, I've seen that before.
Where do I go to get my DLC costumes? I'm just about done with day one and I haven't stumbled into them yet.
Press triangle and go to your rewards barter shop. Either that or they will be in boxes inside the Ark.
Question - does the main story point you in the direction of what areas I should go to first? Like of the 4 main continents. Someone said they went to the Wildlands first - is that because the story had you go there after the initial starting city or did you just wander around there anyways? Just not sure how guided of an experience this game is yet.
I just wandered there. The main story is sort of open ended as far as I am. Go where you want, do what you want. It's almost zelda-esque at this point... you've got to get some stuff and learn some things in order to access certain areas. There are these like 5 areas of interest spread throughout the 4 continent things. And there are main story quests in each continent that can be tackled whenever, as far as I can tell.
But yeah I just saw a train for the Wildlands and hopped on (mostly because it was the train leaving the soonest haha).
I wouldn't say it's a very guided experience. Sort of the opposite of 13.