Guy that I'd be worried about a bit is Decker.
Thomas ((Demariyus) is still a beast and you know he's going to get his simply because of the physical talent there.
Welker has come in an seamlessly fit in with Manning and with him being so dangerous underneath, he's one of th best to do this.
Thomas (Julius) comes in and has a monster game. While this may be an aberration, it's another weapon in the DEN passing game for Manning to exploit.
In other words, I think Demariyus and Welker are going to settle into their respective roles which means they'll gobble up a signficant amount of targets. Julius may be hot and cold, but it's clear that he's a better weapon at TE than either Tamme/Dreesen were in 2012. And quite frankly, Decker looked a bit out of sorts. He can always come back strong and he'll have some good games by virtue of the offense he's in. But I could see him pulling back into the 850-900/7 TD range which is closer to WR3 that stud WR2.