Well after 310 posts (or more) it's doubtful anyone will read this but here goes:
I don't think this is all that unreasonable actually. I think a lot of people are missing a big part of the problem with the 360 "port". From a certain business perspective Final Fantasy going multi-platform is a good thing, it's also a good thing for 360 fans who don't own a PS-3 but want to play the game... well sort of.
It's a bad thing from the perspective of fanboys because by going multi-platform it means that more businessmen are going to start having a say in what happens with the franchise. Not to mention the fact that the development teams will also be spending a lot of time working on making sure the game works on differant sets of hardware and system archetecture rather than working on the game itself.
If you go back far enough to before this was confirmed, look at some of the reasons why people said that this would "never happen", beyond a pure business standpoint. Well now it HAS happened and all those concerns about quality are at the forefront of the minds of a lot of fans. Oh sure, Square-Enix will re-assure people about it, but then again their the ones making the money here, and it's not like they are going to sit around and tell everyone they will quite probably be releasing an inferior product.
Understand, Sony is a corperate Godzilla, very few people are actually fans of the company. This is about the game, pure and simple.
Whether anyone wants to agree or not, the bottom line is that many people believe (and can make some oddly good cases for) single-system games being superior to ones designed for multiple platforms because of there being less concerns.
I also sort of feel that even if it's not an issue right now, that the whole Blu-Ray angle of things is going to be a factor to multi-platform development. Frankly the PS-3 might be hard to work with, but it's still got a monsterous amount of untapped power that can be exploited. If everyone winds up developing for two platforms and wants the games to more or less be equal between them, it discourages developers from fully exploiting the PS-3 and building games around it's capabilities. That IS a big deal if you paid money (especially early on) for such a powerful system, and endured the less than rousing start of the PS-3 because of it's potential power.
Square-Enix being one of those companies that one would expect to be at the forefront of learning to use the PS-3 to it's fullest.
Personally I have both consoles right now, so don't take this the wrong way. In the end it doesn't much matter to me personally (and I really mean this, not as some kind of sideways evasion). I do however understand the point of view of those who ONLY own a PS-3 system. As well as those who do not want another big voice (Microsoft) to have even an indirect say in the development of a long-standing franchise like Final Fantasy along with all the other influances on it. Like it or not, a hardware manufacturer can have a pretty substantial influance on products like this, especially in today's era of online services, DLC (which they host), and other assorted factors.
If for example Microsoft was to demand that Bill Gates make an apperance in every Final Fantasy title from now on (along with Wedge, Biggs, and Cid), with billions of dollars in potential sales on the line, and control over the online services... well... despite being a joke example chances are Square Enix would comply, given the logic that lead to them going cross platform to begin with. After all, from their perspective it's just one more piece of artwork/animation... but to any sane player (never mind a fanboy) Ridiculous example but the point here is that now you have TWO console companies leveraging it.
