Like I said in before the series started, there's no real inherent reason why the refs/NBA would favor the Rockets over the Blazers in this series. The way Lillard has been hyped recently, it seems quite the opposite, actually. The NBA needs a replacement for Derrick Rose, a slashing, exciting point guard who has huge balls and has a reputation for being an exciting closer in tight games. Lillard has a more marketable playing style and court demeanor than a guy like Harden.
I would also add that Wes and Batum have completely mastered the art of the fadeaway shot distraction. The trick is that when Harden inevitably tries to jump into you, jump backwards at a 45 degree angle with your arms pointing straight up. You can't be whistled for the foul if you are nowhere near the guy. As a bonus, he seems so unused to shooting without contact that he does it pretty horribly, so oddly enough you are better off not touching him anyway.
Most true superstars have another level they can turn it up to in the playoffs, making them even harder to guard. Kobe got his no matter how you planned against him. Aldridge seems headed that way.
Harden isn't in that category. If a team has a 7 game series where they can game plan against him, he can be neutralized (provided the team isn't loaded with other talent).