It is a good pick up but I am not sure he helps all that much. What is there core line up now? Does Millsap start over Blake Griffin or do they start both? Maybe it is more injury insurance than anything, which is still good, even if they don't really need him.
Harden
Irving
Harris
Durant
Griffin
or
Harden
Irving
Durant
Millsap
Griffin
Either way, I don't see it making that much difference. As said above, if they have a healthy Durant and even one of Harden or Irving, much less both, they could start Bruno Fernando at PF and win.