Agree'd.
I mean most things in the FF1-FF6 threads actually have to do with the game or things ingame like battles or weapons or favorite skills..
Where as, recently, in the FFVII-FFX forums there have been an increasing amount of theory threads. Granted I can account this ALOT too the whole ultimania guides, seeing as most FFVII "theory's" are based from what the guides say, but I personally think that what happened in the games is the one and only thing that happened and I disregard things like these books that came out 7 to 10 years after the games release.
Either way, the only kind of analyzing older games tend to have is something having to do with a characters background or something like that, for the older ones.. it's trying to find some deep meaningful theory that really means nothing.