First of all, I'm amused that people continually get more excited about language feature creep than better libraries using the language. It's always "bolt some more syntax on."
...
Variations that use arrays and or optionally send messages ad nauseum. It's all in the messages. No new language feature necessary.
Anonymous types are next. Apparently, they're missing ad hoc structure defs. What to say. I'm sorry. This kind of stuff just isn't a big deal for us. I could make a proxy object that would do something like what it does. Again, it's all in the objects and messages. No syntax necessary.