Also, Larian has so much work to do on the fundamentals (UI, controls, writing of Act 1, game mechanisms, etc) that I don't see much value for them in releasing more content (Acts, races, classes).
People who "need" more content, like streamers, are like journalists who rush to publish an article about the latest big news before verifying it. They have put themselves in that uncomfortable situation.
From the point of view of Larian, they had too many people joining EA already. They'll probably be happy if things calm down a bit, and they'll probably do some communication and marketing again when the game gets close to release. Basically, they're fine.