There are a number of consequences of these changes. Because the global gem modifiers are much more powerful than the previous local modifiers, we've removed the low level crafting recipe that added +1 to level of socketed Fire/Cold/Lightning/Chaos gems. This recipe has been replaced with a similar one that applies added fire/cold/lightning damage to spells and takes the rarity of the item into account to determine the mod's tier. There is currently no replacement for the Chaos recipe.
Can we know what this recipe is ahead of league start? This is a very important recipe for a lot of people.