the game storyline

I was wondering about something, in 1.0 did everything look the same before the game changed in 2.0, by this I mean what was happening around outside and in the skies, was there a battle or something over the city state areas? I started getting involved with playing it during ps4 release (don't know what patch that was at the time).

Would everything in the game stay the same in 3.0, despite whats going on with the storyline?

I quite like to know more about the storyline in particular since 1.0, even though I do know its something to do with 'the Calamity' battle

7th umbral story history
https://www.youtube.com/watch?v=TXc0loyuq9I

and there would be no drastic change with 3.0
2.0 was an exeption, because it is a rebuild and 1.0 went offline forever.

There are some youtube videos which have all, and I do mean ALL of the main scenario cutscenes, its 1-2 hours long.
As far as the world changing from 1.0 to 2.0, part of it was a, uh, excuse... lets say, to really rebuild the game.
In 1.0, there were a LOT of reused textures and regions. The 4 main maps (Shroud, Thanalan, La Noscea, Coerthas) looked different, but inside of the maps it was the same textures and rock formations again and again.
At the end of 1.0, Bahamut breaks free and quite literally levels EVERYTHING. It takes what, 5 years? for the land to start recovering.

...Yeah, what Felis said...