No, you're not, but McLaurin is not only a deep threat, he's an after the catch guy who gets separation at the line of scrimmage. A change in quarterback is always something to watch for, and in this case, comes right at most fantasy trading deadlines for redraft, but he's been getting cushions and separation right off the line. That said, the TD Sunday was a bit of a fluke as two guys went up for it from the same team, crashed into each other, and left McLaurin to T1 Terry himself into the end zone after they fell.
I personally wouldn't trade him, though Smith makes me nervous. Then again, this is a guy that had Haskins and Allen throwing to him. I'd roll with it and see what happens.