I didn't see Humphrey, either, but from what I was able to watch (big snow storm here and DirectTV having issues limited what I was able to see) was that Humphrey went against Kelce a lot in the second half. Is that accurate? So, with that in mind, there's still the option of simply put Tavon or Jimmy straight up on Hill. I like those odds a lot better than I like Mosley covering him down the seam.
But yes, Mahomes made some absolutely incredible throws and his ability to throw from awkward angles on the run was incredible and on full display Sunday.