Although I see your point, NeoCracker, I think that they could create a feasibly interesting story while sticking to the continuity.

I think that the direction they took with Cross was an excellent idea, but failed miserably. I'd like to see a more focused intent on Magus and Schala's relationship, perhaps linking them somehow to Serge/Kid and Crono/Marle.

Also, that would allow time travel in a very easy way. Think of FFXIII-2's implementation: I think that would work best.