Neither one of those are the full-size maps of Ivalice - they only cover the regions gone to in FFXII. And the makeshift map connecting FFXII's to FFT's is not possible - at the opening monologue by Marquis Ondore it show a larger map of Ivalice, but one that is still incomplete - looking at that map I can't find a place the FFT map would fit.

On another note - just because Matsuno left doesn't mean Ivalice is gone - The Ivalice Alliance was started after he left the company.