People have tested crafting directions ad nauseum and never found a significant difference. The only basis I see for the theory in game would be the star charts, and iirc most of the common crafting directions are completely wrong when compared to that. SE has already answered the question of directional crafting though "Believe what you want to believe", thats either a resounding "No" or "We don't know", and given their history I'd assume the later. That said, people are welcome to believe what they want to believe, I imagine thats part of the fun of video games, but it wont change the fact that all the empirical evidence and a large amount of logic says the theory is bogus. I doubt they'd even leave such a thing as elemental directions up to crafting alone, if anyone believes in directional crafting they might as well believe in directional nuking.

Which brings me to the OP I guess, where did you get that quote about Polarity? It doesn't sound like what I took back from the VanaFest. They made it sound more like your position in relation to the monster gave different effects, rather than the direction you face. I'd back that up with the fact that they showed an image of a monster with the effects based around its position rather than a player character facing different directions, as well as the fact that Geomancer sounds to be based very strongly on your position for literally every other aspect of its play.

Unless I'm wrong on that, direction plays absolutely no part in this game what so ever and never will, position is the import factor. Sneak Attack is based on your position in relation to your target, as are Yonin and Innin, Polarity sounds exactly the same. I highly doubt there is anything in this game that tracks the direction you face.