Steve Smith breakdown of his top 19 WR prospects in draft. Click the YouTube link for it (it's college film, so not sure where NFL gets off blocking it as their content)
I'm not saying it's smart. I agree I wouldn't take the pay cut especially to go to a worse team like Dallas. I'm just pointing out, given what Diggs has said about playing with his Bros in the past, a reason he may have done this.
They go into WR draft prospects in this, after initially talking about the Diggs trade. Cosell has some good takes on both the trade & WR draft prospects.