Flacco will not improve.

He looks "sharp" every offseason, as much as you try, you cannot shine a turd.

Everyone raves about how great he played in
The AFCC, the fact of the matter is that he did not play great at all. Terrible footwork, pocket presence, holding on to ball to long, several bonehead throws including the awful Spikes pick, and another terrible pass right before the missed field goal. Caldwell is not going to fix Flacco, or make him any better, he has reached his ceiling.

Flacco is a average mediocre Quarterback and that's all he will ever be.