Be brave

[Rentahamster]

Well, clearly Tanaka utterly fails as a producer.

Yep.

On the other hand, he did bring us the immersive world of FFXIV,

This world is totally not immersive. It lags, I can hardly interact with it, everything looks too similar in too many areas, nothing I do impacts the world at all, it hardly has any sense of "life" to it, and it relies on too many stale archetypes in its design.

the cutscene-laden beginning

The cutscenes are pretty, but how is that uniquely Tanaka's vision? Every other game out there has stuff like this.

the idea of a storyline-driven MMO,

This game is hardly driven by story. There are hardly any story quests. They are embarrassingly easy and require no effort on the part of the player at all. They offer no rewards, and it doesn't make a lick of difference if I do them or ignore them completely.

So while he totally blew his chance at making a good game,

Totally. Blew. It.

he is responsible for the best parts about FFXIV.

I still don't see anything of merit that is uniquely "Tanaka's vision" that is even remotely positive. The concept of the armory system, customization, battle regimens, crafters/gatherers being their own class, etc are all pretty nice in theory. Game concepts can be as pretty as we imagine on paper, but look what we have in reality. The game as it was released back in September had Tanaka's stamp of approval, and it was complete crap.

I would say to answer you, look no further than the praise above for the definition of Tanaka's vision. He spoke of it a little during interviews but I think the praise of the launch reviewers is the best source.

The praise of the reviewers, in context of the entire reviews is faint and grasping at anything positive to balance out the overwhelming negatives. The fact that you have to look for reviewers for hints at Tanaka's vision rather than Tanaka himself should obviously point out to you how little "vision" there was to begin with.