I think it is an interesting idea actually. Obviously, they would have to replace Diggs with another receiver. Maybe not in the 1st though. But next year's WR class is going to be very strong in the first couple of rounds.
I suppose the Vikings could get a 1st for Diggs as opposed to Thielen due to age.
They would save 5.5 mil if they traded Diggs. Some of that would be taken by the extra 1st round pick though which would be about 2.2 mil.
I kind of like ideas that are outside the box when it comes to mock drafts.
Otherwise they would all be practically the same.