@property - take it behind the woodshed and shoot it?

[Michael]

int CoolThing { in; out; } - auto property without implementation;

int CoolThing { private in; out; } - private setter; public 
getter;

int CoolThing
{
    in
    {
       _privateCoolThing = @value * 42;
    }

    out
    {
       return 42;
    }
}

Explicit calling: void in_CoolThing(int); int out_CoolThing(); 
Proper "Property rewrite" can be implemented.

Property CoolThing looks like code contract for 
_privateCoolThing. So it's maybe + or -.

At all, it looks like C# style in D Way.

--no-parenthesis for current behaviour for non-property functions.