We already know much about the answers to question 1-3 just from talking to many NPCs in Eorzea, which should be obligatory to any roleplayer who wants to know more about the world his or her character is going to live in.
I don't want the lore to be handed to me on a silver platter, thank you.

4.-6. sound interesting, but I'm sure we will get more information on this as the story progresses.

About 7...I totally disagree with you.
Especially as a role player you should be bound to your character and play through every situation.
We also can have just as many characters as we want and pay for only one, because we pay only for the one "active".
So if you really get bored of one character you made (which is poor design, btw) you can just switch to another one after a month.
Just my personal opinion though.