Well, Scribe, I have an incomplete list of some changes, so here we go.
1. Disengage is a bonus action
2. Like, a lot of the Ranger.
3. Dipping and Shoving as Bonus Actions
4. Wizards can learn Cleric spells. I hope they remove this one eventually, personally.
5. GOOlocks don't have any Level 1 features, and the Pact of the Blade and Pact of the Tome aren't present.
6. Rogues don't have experitse ;-;
That's most of the notable stuff that I can recall. Hope this helps!
6. Thieves also gain a second bonus action instead of second-story work, since there is no climbing, cunning action only works for Dash as Hide and disengange are bonus actions for every class, which makes the Rogue weaker in comparison.
Cunning action: Hide specially is one of the most iconic features of the class in the PnP.
