>Start of the game is a cyberpunk story about the resistance to the Shinra company
>After Midgar it turns into standard Final Fantasy Fare, and could fit any Final fantasy game and mostly ignores the stetting
>The story of Seph + Jenova + Meteor could be transported to FF5 with no problems
>Shinra falls by the wayside
>Shinra is irrelevant in the sequels
That's because Shinra was only a small part of the bigger picture of the whole storyline. Shinra was not the main antagonist.