I have been thinking about this for a fair while now. 1.5 years to be precise.
See my early attempt to start (to be more precise to continue on previous discussions) discussion on this: Deferred Evaluation Initial Proof of Concept
My current take on this is that convenience syntax decisions can be left for the very end.
The major issues of this direction is not in syntax, but in concept and implementation.
Same as with many other syntax affecting proposals, my take is that it is best to explore whether good enough solution can be devised via implementing and combining a set of tools that use existing capabilities.
And question “whether syntax conveniences are needed” will be much easier to answer once there is a clear idea of what the functionality exactly is and its usefulness.