Strangely, some of Dallas' fans seem to be saying the same thing. I think Jarwin's time away for injury has made some forget that he's not much of a blocker. We need Jarwin back, but the reason for that is because he's a really good receiving tight end. He can hit those seams down the middle that open things up on the outside for the receivers.
Despite his failures at it lately, Schultz is the better blocker and is more of the short- to mid-range outlet as a receiver. Having Jarwin out there instead of Sprinkle or McKeon gives us that deeper threat that puts stress on the defense both in the passing and running games, even if he's not a great blocker.