So... that spiderman shirt... (new job tease)

[Lambdafish]

The only thing YP said about BLU being hard to implement or anything of the sort was back in 2014.

Pretty sure he reiterated it as late as vegas (could be JP) fan fest 2016, though don't quote me on that or ask for source. It was an interview saying that they would not implement BLU until they found a way to fit the core identity of the job in an MMO setting, and that keeping the enemy skill learning aspect of the job is important, which he has admitted that they have not found a way to do that yet (who knows, could be a red herring, but it does seem weird)