Happened to saw this thread at the French side:

http://forum.square-enix.com/ffxiv/t...S-Strategie%29

Sorry if I did miss any dev/com rep input with regards to this since there are really many such threads created in the English forums.

I believe most of the players agreed that the LoS method is not a bug nor exploit since the idea if LoS is apparent throughout the whole game and is essential for tanks to dodge certain mechanics such as Garuda's Slipstream.

The French community rep says that he will bring it up to the developers to see if this strategy is actually considered and exploit and whether it will be accepted.

Just wondering if any of our EN reps would like to keep track of this and update us in the EN forums?