Without Randall Cobb the Packers are in a real predicament in 2015 (Reason: A lack of trusted depth @ WR).
The objective is to get him signed and don't allow him to test the market:
If TT offers Randall Cobb 4 years for $34 M$ and $20 M$ guaranteed.... he'll sign.
It seems like this was offered.
But Rodgers leads the league in frumpy expressions and negative body language on the sideline, which makes him, like Josh Allen, a unique double threat.