Lucky - Choose to gain advantage, or force disadvantage after you've seen the result of the roll seems a little strong. Strikes me as a feat everyone is going to get.
Musician seems similarly powerful for handing out Advantage.
Savage Attacker looks like another must have for none casters.
Magic Initiate - "Whenever you gain a new level, you can replace one of the Spells you chose for this Feat with a different Spell of the same level from the chosen Spell list." - Glad this is a playtest... same as what level? The level I gained as a character, so at 3rd level I can swap my 0-level Cantrip for Fireball? Bit of clarity please.
Really not sure about the feats, some seem OP compared to others.
Slowed Condition implies movement is tracked in individual feat, rather than 5ft increments, not sure why they would decide to do that.
Critical Hits - looks like roll to attack spell no longer Critical, unless they are being classed as Weapons now. Not sure the reason for the change, perhaps they are trying to redress the balance between martials and magic users... haha who am I kidding.
Skill Rolls now fail on a natural 1, and succeed on a natural 20. r/dndmemes will have to think of something new.
Short Rest - The mechanic seems to exist but isn't detailed.
Orcs - All orcs were the creation of Gruumsh, the One Eyed God, regardless of the gods of the setting? Seems an odd choice when you have the ...of Many Worlds, for each Race (they stuck with the word race, I'm pleasantly surprised).