What's left to do for a stable D2?

[bearophile]

Jesse Phillips:
> This page[1] has been getting regular updates, so it should do a good
> job answering the question.
> 1. http://www.prowiki.org/wiki4d/wiki.cgi?LanguageDevel#FutureDirections

Most things on that page seems OK and not too much complex to understand. There are two things in that page that I think need more discussion, because I don't understand them or I don't see their need:
- Remove struct initializers.
- Make array literals immutable.
So I'd like an explanation of what the first means, and why body are useful/necessary.

Bye,
bearophile