I think it's a very interesting offset, although there'd have to be some sort of villain trying to disrupt things(I'm tempted to say a return of the Void from FF5, but I don't think that'd go too well =P), or things would quickly lose focus.
The prospect of travelling to the alternate world sounds good too, and seeing what things would be like, although if Ultimecia had her will, she'd have compressed and absorbed all of that world(more correctly all of that 'time and space') so there might not be anything to see =P
Although assuming she recreates some sort of hellish dimension where she rules, and everyone are her slaves, I can easily imagine a great setting for the last dungeon/castle.
Oh, and I'm not going to rise to the bait about the fate thing. I don't know what arguments you've had thrown against you, but the discussion just isn't relevant to this topic anyway. Besides, it doesn't look like any amount of discussion will budge you