Originally Posted by
Anonymoose
I waffle on this one a lot.
Final Fantasy is a franchise about saving the world you know and love against all odds and challengers. I think that's why it tends to feel cheap when they bring in alternate dimensions and timelines that make your world smaller and less significant with (cosmologically speaking) less at stake.
FFXIV seems to have tried to mitigate this a bit. They admitted up front that "the (one) universe" was broken and now there are (fourteen) dimensional planes. Alexander seemed to show us that time long before us and time long after us was set in stone unless manipulated from the outside, changing the past, present, and future all at once depending on your individual chronological locale.
Changing or adding to these already-extant things rather than making use of them in a novel way risks cheapening the world or further convoluting the setting - something every Final Fantasy game is wont to do (to its own detriment at times), especially in the final few chapters, lol.