The mission of Jesus was to whole people, body and soul. If your mission is more limited, don't blame it on Jesus.
It's difficult for me to grasp precisely what Moore means by this in a 140-characters-or-less tweet. I assume he does NOT mean that we should attempt to replicate the full mission of Jesus. IOW, I doubt that Moore will be attempting to offer a substitutionary atonement anytime soon or, as Gilbert notes, to kill all the wicked.
The problem is that unqualified identification of our mission with the mission of Jesus invariably introduces ambiguity and confusion. Unless this ambiguity is clarified biblically, I suspect we're looking at the fault line that will form a crevasse, dividing evangelicals—even conservative, reformed evangelicals.
I look forward to thinking about this via Gilbert and DeYoung's in-progress book, and the audio from MACP later this month.