Golden State did get outshot by SA though.
Phoenix is always interesting because they were some unfortunate plays away from it "working" in the playoffs. WCF 3 times, lost in 5, 6, and 6, but of course at some point in time you have to defend.
Phoenix also had size issues, for example SA basically won due to offensive rebounds
SAS: 118.6 Ortg, 11.0 TOV, .197 FTA/FG, .529 eFG%, 35.4 ORB%
PHO: 114.0 Ortg, 12.5 TOV, .186 FTA/FG, .534 eFG%, 26.8 ORB%
They had small positives in other areas, but the main one was offensive rebounds.
If this team can score that much, both personnel and coaching wise the defense just has a much better prognosis.
How did Dallas win?
DAL: 114.4 Ortg, 9.9 TOV, .241 FTA/FG, .485 eFG%, 32.2 ORB%
PHO: 111.5 Ortg, 11.4 TOV, .181 FTA/FG, .534 eFG%, 21.3 ORB%
FT's and Offensive rebounds were their main advantages
Lakers was a different situation, they had Robin Lopez and their offense was arguably even more potent, but they didn't have the individual defenders in Bell and Marion. If you could have mixed the size of the 09-10 team and the perimeter defense of the 05-06 team, they really had a good chance
LAL: 124.2 Ortg, 10.1 TOV, .210 FTA/FG, .552 eFG%, 32.6 ORB%
PHO: 119.6 Ortg, 10.8 TOV, .306 FTA/FG, .530 eFG%, 28.4 ORB%
Lakers were the only team that actually out-shot them from the field. Lakers were also the only team that didn't draw more fouls and didn't have a big offensive rebounding advantage. The 09-10 team had Amare/Frye/Lopez in comparison to the earlier teams with Marion at PF and Diaw at C in 2006.
Their offense was certainly still powerful in the post-season, but they couldn't defend mainly because they couldn't grab the rebound. The Lakers 124.2 Ortg is just legendary, even Memphis at 119 Ortg in their 4 wins wasn't that good, but Memphis at 119 is as impressive since they were a bad offensive team during the season and that Laker team was not bad, and much better if healthy.
So even if the Clippers this season are similar to that team:
1) Can they rebound better defensively? - Yes
2) Do they have a better defensive coach? - Yes
3) Do they have better defensive players? - Maybe (Marion and Raja were pretty good though)
So even in that way, this team has better potential.