Mueller only had 37 points last season with the Coyotes and the Avs but 20 of those points came in the 15 games he played after he was dealt to the Avs at the trade deadline. He was a major reason why the power play started picking it up at the end of the year as he was able to get off quality shots and scoring chances from the right point (something the defensemen were unable to do).
His point total after coming to Colorado probably had him thinking huge pay day but that last concussion he received after being put into the boards by Rob Blake had something to do with the lower salary. He missed the entire playoff series with the Sharks with that concussion and it was his 2nd concussion in his young career. The 2 years he received is a fair contract as it will give him enough time to show that he can stay consistent and injury free before being paid the big bucks.