First of all Losman will never stay in Buffalo no matter what he does, Jauron does, or the check he is handed. In Edwards growth as a QB Losman starting is a bad idea.
BUT...
No you cant blame Edwards for not creating holes, or getting receivers open. One thing is for sure though, he isn't helping it. Edwards flaws are JP's strengths. JP would provide some spark into the offense and make the defense guess. Something Trent will NEVER be able to do. He has a slightly less than average arm, so DB's don't need to worry about the deep threat, and his footwork doesn't scare anybody either. JP can help the line by backing off the rush to protect the deep threat, and DB's neeed to respect the fact that he can run.
The fact of the matter is Edwards isnt doing anything to really keep anybody guessing, and as teams keep getting more and more tape on him, and as the weather turns, it will probably only get worse as the season goes on. THANK THE LORD WE PLAY MIAMI IN TORONTO
I would like to see what JP can do out there, but it's not practical for a team that has committed to Edwards(although probably the best immediate decision)
BEST ANSWER: Coaches step up and get teams guessing/ do their job