Figure I will set up the official thread for discussion / feedback / coolness / anger about D&D Basic!
First one; I'm loving Chapter 4 and how they use Artemis and Tika to compare and contrast how characters who are similar mechanically are different in play.
Multiclassing is mentioned; but they drop a new? caveat; you must meet both the current class and the new class multiclass prerequisites. No more level 1 10 STR fighters MC'ing into Wizard.
Remember, as time goes on, Basic will be updated as they release more and more of their content for free. So Feats may eventually show up in Basic; but they want to explain the concept in Basic and point folks towards the PHB if they want to use it.
As was hinted, the second attack when two-weapon fighting takes a bonus action. That means a fighter with Extra Attack using Action Surge gets only 5 attacks (4 normal + 1 extra), not up to 8 (4 normal + 4 extra, depending on interpretation). Not sure how I feel about that yet.