In my estimation, even if Doc said "We will see" as to whether or not the trade has made us better, he also said he likes it from the standpoint that we now will have a unit to finish games similar to 2008 when we won the championship. We need a James Posey type guy and I think Green will be better than Posey. 
So, the argument that Doc must think the trade isn't for the betterment of the team this year is not correct.