This is my final rant so pay close attention. I used to be a WR back in my day. I've played with different QBs. I've played with QBs who threw it mid power but accurately, I've played with QBs who threw it extremely hard and accurate, I've played with QBs who threw it hard an inaccurately, and I've played with QBs who threw it extremely soft with very little zip, so he would loft it out there early. The one thing I do know is, if it comes to you at all, YOU HAVE TO CATCH IT.
I sat there and watch Dez consistently drop balls, not fight for balls, allow DBs to block him out, doesn't finish routes. What happens when Dak throws to Witten? He catches it.