Successful LWT INSERT should return any server generated values

A failed LWT INSERT returns the row that prevented insertion, along with [applied] boolean value. A successful LWT INSERT only returns [applied].
It would be helpful to also return any other server generated values, e.g. NOW() as [now] (or whatever).
There is currently no way to know what exactly was inserted without re-querying the row, which is horrible for write-throughput.