Several New Optional Reagents Added in 9.2 and UI changes

In patch 9.2 you will be able to add several new optional reagents when crafting gear,

There are new slots added on the ui when crafting a piece of gear.

In 9.1.5 the UI had 3 slots

In patch 9.2, the UI will have

Specify a Secondary Stat

This looks the same and acts the same as before.

You will add a missive in each slot and the missive contains a secondary stat.

Gear that you craft can either be modified with Minor or Major

Minor

Can only use

Major

Can use all different Crafters Mark. And two new ones have been added in 9.2

Novice Crafter´s Mark
Set ilvl to 87, req char level 50.
Crafters Mark 1
Set ilvl to 117, req char level 55.
Crafters Mark 2
Set ilvl to 168, req char level 60.
Crafters Mark 3
Set ilvl to 200, req char level 60.
Crafters Mark of the Chained Isle
Set ilvl to 230, req char level 60.
Crafters Mark 4 - NEW
Set ilvl to 233, req char level 60.
Crafters Mark of the First Ones - NEW
Set ilvl to 262, req char level 60.
This one is unique-equipped, meaning that you can only wear one of them.

A totally new slot added in 9.2 that will add sort of power on your crafted gear.

There are 8 different progenitor enhancements:

Magically Regulated Automa Core
Chance to spawn an Automa Core which explodes for damage.

Cosmic Protowave
Increase Avoidance and sometimes heals when taking damage.
Infusion: Corpse Purification
Chance to acquire additional resources from corpses.
Ephemera Harmonizing Stone
Chance to harmonize Ephemera, granting Primary stat when acquired.
Pure-Air Sail Extensions
Increases movement speed and mount speed while in the Shadowlands.
Erratic Genesis Matrix
Being stuck by an enemy builds electrical sparks. At 5 stacks, the circuitry shorts and lashes out.
Devourer Essence Stone
Slaying enemies increases your highest secondary stat for a brief moment, stacking up to 10 times.
Sustaining Armor Polish
Increases the duration of flasks, elixirs, and food buffs.