There's nothing here to learn they haven't already acknowledged. Most of their games are not announced until a more or less reasonable 6-18 months prior to release (some even just 3-5 months). They already learned this during the PS360 generation. They had their reasons for announcing some of the current gen games early, and even then all of these are different to games like FF Versus XIII being announced in 2006. FFXV, KHIII & FFVII were all games that had been in active development for some time by the time they were announced and would continue being priority projects that would be in active development throughout the years after their announcement vs. something like FFVsXIII & Agito/Type-0 that were hardly in production or more than a logo when they were announced and would be sidelined by other higher priority projects for many years after their announcement.
FFXV's (re-)reveal, KHIII & FFVII Remake were announced early to drive up interest in PS4 in Japan (of course worldwide too, but Japan specifically). It was SQEX's way of trying to do their part in not letting the Japanese home console gaming market dry up completely with the idea that people would take note of the approaching launch of PS4 (and XBone, lol). To give at least some of the ever-diminishing number of home console gamers in Japan a reason to have continued interest in owning a new batch of home consoles & their games on them (because even with the dropping numbers, getting some 1-1,5 million units sold in Japan is nothing to scoff at, even if they are further and further away from the top sales the franchises had during the PS1 & PS2 days or handheld sales monsters). You can, of course, disagree with what they are doing or question if it's doing the Japanese home console market any good, but the context & behind the scenes is a bit different with early SQEX announcements in 2006 vs. early SQEX announcements in 2013-2015.
