I'm all in on letting Dorsett get a WR3 role and seeing what he can do with it. But, when we look at the numbers, we still need context to try to be fair. When Edelman and Gordon had yet to join the team, Hogan was serving at the WR1, and Dorsett was the WR2, each facing the appropriate opposition. So Hogan was up against better competition. And it was Dorsett, not Hogan, who was getting the bench splinters after Edelman and Gordon started playing.
For me, it's about a potentially declining player versus a still young player who has room to grow and is already on about the same level as the older guy, and the desire to keep only one of them. It's about wanting the team to bring in a draftee or two to go along with Edelman, Dorsett rather than Hogan, and a WR1/WR2 (Gordon or otherwise).