What is so wrong about Datalog? Everything that is mentioned there regarding to the story is always presented in cutscenes or via Vanille voice-over. You have to pay extra attention to the dialogues and read between the lines to catch it all or if you are a loser like Himuro reach for Datalog where it is all nicely laid. Moreover people adore umm... logs and mails in games like SS2, Dead Space, BioShock etc. but dislike in FF13?
Hint: you didn't have Datalog in FF8 and the story was confusing as hell.
Datalog also has a very nice background on every character, mythos, locale etc. It is really an impressive part of FF13. Too bad the Enemy Intel sucks so much donkey ass: cannot rotate monster models, no FF12-like story on each monster etc.
As for the story in FF13 up to Chapter 7: it is really fucking great. I love having it unraveling between my eyes in full HD glory bit by bit, chapter by chapter, each time going back in The Thirteen Days timeline a bit and explaining something that caused another thing later on. It reminds me VERY MUCH of how Memento was directed.
You can hate FF13 for it's 100% distinguished mentally-challenged linearity and laughable maps when compared to FF12 but it's story is one of the top in the series.
<3 Fang
<3 Hope's Mom
And the graphics... OMG that's story for another post.
Datalog sucks and obscures every single bit of the world's history and just about every major tangent of plot development. How in the world can you defend it?
LET ME EXPERIENCE IT, DON'T TELL ME ABOUT IT
The game assumes you already know what the it's talking about and the only way to understand is by reading the datalog. That is fucked, especially in an rpg, doubly so for being a video game, which is about interaction first and foremost.
Finally, FF8 did have a datalog but it expanded upon things already known, it didn't hide important plot details.
In all FF's there's a sense of culture of the world, a history, and it's usually pretty interesting. In FF13 this is all tucked away in a datalog. In FF10, I know about the sending, the farplane, pyreflies and this thousand year long history going on because of npc interaction and exploration, just like how rpgs should handle world-building. FF13's way of handling things is fucked.
Even games like Bioware games have datalogs, but they never obscure important details of the world in it, they are only meant for extra shit. In FF13, the only way to get the full story is to read the datalog. How in the world is that a good thing?