If you read Bronco's forums about Decker they seem to think he's a big pussy (as in he's not physical at all and physical DB's shut him down bad), drops a lot, and calls for a flag on EVERY down. I've noticed the flag part only because I looked for it, no real comment on the other 2 as I haven't paid enough attention to see.
That's not true unless you've only seen 2 Broncos games. He's been up and down all year. He's had a few HUGE games, but other than that he's been relatively quiet.
Boldin cannot get separation. He can kill a defense if they forget about him because he'll win a one-on-one almost every time, but in order to truly be useful he needs a #1 drawing the top corner and safety help ala Fitzgerald or Crabtree. Ever since defenses started keying in on Boldin he's been pretty minimal in production. He'd be like Plaxico Burress 2.0, essentially.
I get the Plaxico hate, I do. But he did contribute to one of the only positive stats of the 2011 Jets. We were #1 in the league in redzone td percentage. Someone like Boldin could also help with this, honestly.