These are the things the Character Ref team are currently thinking about changing/adding to the rules. None are yet set in stone and more details will come out closer to the time.
Healers
Add to game
Regrow
Improve usability, add Non-Stackable
Discern Spiritual Strength
Remove as miracle, add as medical skill
Discern skills
Change to be usable simultaneously.
Tree Heal
Add Non-Stackable
Darkness
Reworked Dark Entangle to Shadow Web
Added Ignite to list of things extinguished by Dark Extinguish
Necromancy
Revise Summon Undead Servant in line with Animate Dead and the Monster Manual
Remove Enhance Undead
Tree and Water
Added Trigger Trap, Hold Trap and Aura of Trap Immunity
General
Changed Transcend Armour range from Self to Touch
Death
Changed Bolster Undead range from 20’ to Touch
Background Skills
Add more examples to how to apply background skills
Codify manufacturing skills and times for mundane items
Codify costs and times around Masterwork Equipment.
Armour abilities
Add in some form.
Rituals
Add costs for purchasing ritual scripts
Paladins
Codify Roleplay requirements and penalties
Defenders
Change NCO bonus points to keep if unspent immediately.
Items
Remove Preparation.
Add examples for resolving Bound and Attaching items.
Monster Manual
Rework Monster Manual
Revise/Define phys-rep standards for armour.