If I was going to put two different tiers of good teams they'd definitely be in the lower one, but they do the job and are a competent team which is more than I can say about most of these other teams.
Why would they make that trade? The entire point of Denver dealing people is to gather picks to rebuild, what's the point of trading a WR they aren't satisfied with for one we apparently aren't satisfied with who can't even get on our field?