The Houston Rockets may have the best 1-2 combo in the backcourt in the NBA right now with James Harden and Chris Paul at the helm, but they have not addressed their biggest need, which is a stretch four that can defend the rim. Ryan Anderson is great offensively, but he is not a bruiser or shot blocker down low.
Now obviously those stretch power forwards who are also great defensively are in short demand as Paul Millsap and Blake Griffin are the only two big free agents that overall fit that mold.