Dallas won last year because of their defense and their depth but mostly because Nowitzki was so good down the stretch of games. And the majority of the time he was getting the ball at the elbow or somewhere within 16 feet of the basket and backing down his guy or very often taking it to the rim.
The Lakers show year in and year out that the regular season isn't that big of a deal. They always drop games like this to the other good teams. Also, they are in a transition mode with Sessions at the point. In the playoffs though I will always take the team with the better big men and right now the Lakers have a center who is capable of dominating down low and another 7 footer who just so happens to put up 15-20 on a regular basis and grabs plenty of boards. Helps that he can pass the ball well too especially with another big guy down there with him.
Good defenders know how to frustrate Durant. All you have to do is get up on him and stay close. How many times did we see Tony Allen push him out almost to the halfcourt line just to get the ball in that Memphis series last year. It's nice to have a guy like Ibaka who can defend the rim but other than that OKC's frontcourt stinks.