Diabolos was, in ARR at least, one of the more crafting-focused servers, so competition can at times get a bit cutthroat. Omnicrafters here are already often at war with one another on the highly desirable markets before even considering folks that may only have a few crafts at max level.
We can roughly guess. Yoshi-P's said that after 3.1, they'll be back on the normal patch schedule, which suggests we'll see 3.2 about 3.5 months after 3.1's launch, sometime in February. One poster mentioned December, but that's actually for 3.15 (the patch adding Anima weapons).