I'm sure this is old news to the people that were complaining about this, but just in case, I'll put up what a blue (Blizzard poster) said earlier regarding some concerns:
- Lack of Chat Channels
... and we just announced that Chat Channels are going to be in the game a few months after release.
- No Cross-region play
... and we just announced that cross-region play is definitely in our plans.
- No Unique ID
... And we just announced that every combination of nickname 3 digit code will be unique and you will be able to add friends by using this combination.
- You need to give out your email address
... Which is not the case anymore, as adding Nickname.007 will be enough.