My point is that when Square Enix begins a proper marketing cycle for their games (note: like they've said they are now starting for FFXV), it USUALLY means the game is no more than 6-9 months (+/- a month or two) from its debut release. 13+ months of previews, trailers & shit is just excessive, especially after they've already been showing Episode Duscae for almost a year. To think that they might still take almost 15 months to market the full game?
Even the examples you gave had 6-11 months of marketing, so I don't understand how you are suggesting FFXV would have promotion for 13-15 months. Where, exactly, is the logic in that? Even based on your own "evidence", a far more likelier scenario is some May 2016 - July 2016 release, not September-November 2016.
Type-0 was a PSP game with a relatively short development period & limited resources. This is a big mainline console FF that has been worked on (in its current form) for 3 or more years by now and Tabata's Type-0 team is only a part of the development team. It's not all that likely that FFXV will remain at the level of Type-0. Episode Duscae's single dungeon, what we've seen of cities and stuff like the Behemoth quest already show far more interesting scenarios & locales than anything in Type-0, even if the cave could've had a bit more variety in enemy types to make it a bit more interesting to go through, instead of the endless swarms of goblins.