From the red basement:

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Psychic Details:

• Global change: Amp wording changed, can no longer be used with any activity requiring as a subordinate action, such as spellstrike.
• Unleash works on duration spells now if they deal damage for the initial damage (Changed in edit: was not nerfed, wording was moved around)
• Vector Screen is 10ft-20ft line (up from 5ft-10ft)
• Organsight Replaced with Locate for infinite Eye Spells
• OsW Spells Changes: Breath Fire, Blazing Bolt, Fireball, Ice Storm, Howling Blizzard, Frozen Fog, Volcanic Eruption, Arctic Rift, Falling Star
• Whispering Steps is now a Stride, not a Step. Still considered forced movement so wont trigger reactions.
• Tangible Dream Spell Changes: Dizzying Colors, Invisibility, Confusing Colors, Resplendant Mansion
• Imaginary Weapon nerfed: 1d8s to 1d6s. Damage type changed to Force.
• Violent Unleash: Costs 1 action, no longer stuns. This is a nerf, as you can no longer 'pay' for the stunned action with a quickened action, and it no longer is 'free' if you're slowed (stunned and slowed wont stack).
• New Feat 12: Amp Focus (Regain 3 focus points when refocusing even if not all used on amps)
• Feat 20 Twin Psych: Reduced from level 20 -> level 18
• New Feat 20: Autonomic Psychic Action, Permanent Quickened for Psych Actions
• Feat 20 Become Thought: Removed Spirit Weakness

Psychic Archetype:

• Dedication: No Amp or Focus Point with initial psi cantrip, still gain passive benefit
• Psi Development (6): Now enables amping of cantrips in addition to granting a second cantrip, gives only one focus point.

Time Mage Archetype:

• Chronocognizance still literally impossible to grab cause it requires master in perception still
• Spell Acceleration (Renamed from Quickened Casting): Gives Quickened Casting Feat? (No can't stack)

I'm currently dealing with the flu so to exhausted to look over thaum and compare to nethys, but that's all I found in regards to the classes I play.

Edit 2: It's been asked a ton, don't worry thaum players.

• Chalice scales better / buffed in other ways: temp HP equals level instead of half on effects, reg HP heal is 2x level
• Lantern intensify better
• Mirror adept is now a 'Can' choose to explode
• Wand does better damage more often: 3d4, always end of next round recharge. Intensify bonus is equal to level, not dice
• Paired Link buff: No range limit, both people treat one another as adjacent for spells and thaum effects regardless of distance. Followup feat adds the 30ft limit, but only if allies try to cast spells on each other, the thaum links are still infinite range