What's next for Bluesky? We're working on some of your most requested features:
DMs, video, improved Custom Feeds, better anti-harassment features, and a new login tool called "OAuth"
Check out the roadmap here: bsky.social/about/blog/0...
I agree that that default would be ideal for many reasons. It's how most people would use DMs; it'll also prevent ugly surprises for big accounts, and for anyone who's been off the platform for a while who suddenly comes back after DMs launch.
From accounts you follow with request option from accounts you don't follow. If it's a brand new account there needs to be a hold somehow to prevent spam.