The Tasha's Cauldron of Everything hits keep coming from D&D Celebration 2020. This time we're talking about new class features for every class.
So looks like this UNEARTHED ARCANA from November has been integrated into Tasha's, from what was said on the livestreams this weekend.
4 new fighting styles (blindfighting, thrown weapon, unarmed, interception).
Barbarian gets danger sense and survival instincts, plus fast movement and instiinctive pounce.
You can now learn a new spell in place of another of the same level whenever you finish a long rest.
Any time you get an ASI you can also change a skill proficiency.