If I recall correctly, origin characters won’t be playable in EA at launch. I feel like I heard that in one of the streams, but I could just be mistaken and making up nonsense.
Backgrounds only affect proficiencies, so that isn’t going to make a big impact on how Lae’zel plays regardless of her class build.
Can you change origin characters’ classes? That would be weird for characters like Gale and Wyll, as their classes are so integral to their personal stories.
Backgrounds (in TT) also come with a feature.
