In the upcoming 8.1.5 update on March 12, players can take part in unique quest lines for the Alchemy, Blacksmithing, Enchanting, Engineering, Inscription, Jewelcrafting, Leatherworking, and Tailoring professions to earn a new Tool of the Trade that complements their craft.

Patch 8.1 Tides of Vengence goes live on December 11. / 12. (US/EU).

General Changes

• Darkmoon Faire quest-based skillups now apply automatically to the most recent expansion profession progress that is not at its maximum.
• Professions-related World Quests now have a chance to reward Expulsom.
• Herbalism World Quests now have a chance to reward Anchor Weed.

The Battle for Azeroth Pre-Patch goes live July 17th/18th. (US/EU)

Patch 8.0.1 will contain the BfA profession skill squish I mentioned in my Battle for Azeroth Profession Overview. I made this post to make things more clear what will happen to your professions.

Patch 7.3.5 introduces a new scaling system similar to what we have in the Legion zones, so every mob will scale to your level now in older zones too. Fortunately, the scaling is capped at certain levels for each expansion, you won't be fighting level 110 mobs at Barrens.

So if you farm old materials with a level 110 character, this change shouldn't effect you since you will one shot everything anyway. However, this will make it harder to farm with lower level characters.

Skinning and Tailoring

Based on the tests I did on PTR, there was no change in cloth or leather loot tables. So, even if the mobs scale up to a higher level, they will still drop the same leather and cloth as before. The level 58-60 mobs in Barrens still dropped Light Leather and Linen Cloth.