Some thoughts...
As noted by myself and others when Nelson went down, his loss was going to have a deep and across the board effect. It seems now that not only is that true, but it's having an even deeper effect than originally believed.
With no true deep threat- no one to 'take the top off' of defenses, teams are playing our WR's tighter than usual. Jones has vanished; opponents will not allow him to be a deep threat. Cobb dropped what probably would have been a TD, and unless put in certain situations/formations designed to get him space, has a hard time beating tight coverage.
I don't consider Adams to be the next big star, and yesterday's performance bolstered that belief for me. His inability to control his temper and emotions resulted in a drive killing personal foul penalty. Something else for opponents to add to their book on him. I've also noticed- in particular the deep sideline pass and the 2 point attempt, that he generally doesn't do a very good job of winning body position battles and making plays on the ball. This was most evident on the 2 pt play in which he didn't adjust his body position/route enough to shield the ball from the defender, allowing him to get his arm and shoulder in front of him. Also bothersome on the same play,was that he jumped-which was completely unneeded and tried to body catch the ball, which he does often. Think of Nelson; he catches everything with his hands, away from his body. Chris Carter was another; it's a hallmark of great receivers.
Yes, he had 10 catches- but on 21 targets. Not so hot, gang.
Good to see Abbrederis have a good game; let's see if he can continue now that teams have some film to start a book on him,too.
In short, and probably beating a dead horse, we don't have anyone who can be a true #1 receiver, or that can take on enough of Nelson's role to make a difference, leaving them facing the kinds of defenses and coverages that they're having such a hard time handling. and with no threat from the TE position to help out, it's likely at this point that things won't get much, if any better.