This upcoming title suggests Matthew published a collection of documents long before Matthew compiled it all and redrafted a new, expanded composition. (H/T, CJ) Personally, I think that sounds like a positively brilliant bit of new & worthwhile Synoptic theory... if I do say so myself.
But seriously... even if I could say I'd thought of something like that before, (which I both had and hadn't, precisely), I'm glad somebody knew how to take it as far as it's now being taken. Most of all, I'm thrilled to see more developmental (4-D) thinking going into these kinds of studies.
I strongly suspect B. Ward Powers is onto something. Matthew probably was first... before he was last.
[Update: It'll be available October 1st.]