I think it's good because they were looking to ship Chris Paul anyway and probably got more than they expected to. Let me be clear, I love Chris Paul, he's an old school point guard that spreads the ball around and it's a pleasure to watch, but he's getting long in the tooth and the main reason it was a good move is because the guy is perpetually injured, he has a big contract to eat for how many games he misses.
As far as Westbrook and Harden being successful together I think it's a toss up but it's definitely not going to win come playoff time, these two players put up huge numbers but really are the most overrated players in the game. We've seen enough to know Harden's iso style of play doesn't hold up in the playoffs as well and Westbrook is just a bad point guard imo, phenominal athletecism and defense but really bad at running point. Westbrook does a few things with the ball; midrange jumper, drive and score and drive and dish. This is going to benefit Capella just as it did Steven Adams in OKC but pretty much no one else. Harden will get his touches in for sure but no one is going to get the ball on this team except these three players and the only reason Paul George had success with Westbrook is because his defense gets him automatically involved in the offense so on a Westbrook team to have success you can either be another guard that holds the ball a lot, a center that gets inside, or be such a good two way player that it doesn't matter....the rest of the team are wallflowers.