Well the biggest issue is thinking that they had a competent receiving core to replace the losses of Desean and Maclin. At least at RB, they made an attempt to replace McCoy. At WR, their attempt was relying way too much on young players to be able to step in immediately and replace the type of production that Desean and Maclin gave them.
yeah, looking back, they should have resigned Maclin. Matthews' drops all through the first half of the season really hurt us as a team. I'm sure Kelly was counting on him to step up as a #1. I did like what I saw of him after the bye. They need Agholor to improve. He's a 4.4 40 guy who would be a great compliment to Matthews if he steps it up.
The slim good news with our WR's is that there's only one direction they can go. Usually WR's need time, get better with more experience, and develop within a new system. I know we've seen a lot (maybe enough) of Huff, but I haven't given up on him yet. Still think if they can fix their damn drops, and have another full offseason with Sam, that JMatt, Nelson, Huff, Ertz can become a (slightly) above average receiving corps next year.