I understand it's a lot of catching up, I'm against the option of catching up. However I do like the idea having access to a story summary. What new expansions should do in the future is provide some content for lower levels to enjoy. I think FF11 did this pretty well. CoP's early missions required level 30. The new jobs in ToAU, WotG, and SoU all had extra jobs accessible to players without requiring story progression. Difficulty of unlocking those jobs varied, but all possible.