I watched on a bad feed from raptorsnation.net and missed a lot of actions. But from what I saw, several issues contributed to the loss, not hitting the open jumpers is not really a concern.
1. Nash and LB rushed to quick shots or bonehead drives, say about 5 times each. That's 10 possessions.
2. Amare was frenquently covered by Manu or another small player, and I guess Diaw too. But we couldn't exploit it, an issue that's been there all the time but we never seemed to have worked on it consistently. (Or is Amare really too dumb to learn it?)
3. Most importantly, at crunch time, we only have the Nash-Amare p&r, which proved to be turnover-prone despite its near perfection. Nash had to try/force those risky passes in the paint, cos we didn't have, weren't given, viable alternatives. (Sure, when it succeeds we watch those emphatic finishes Amare provided us. But the odd is not always good enough, depending on game situations.)
Missed FT or open jumpers are normal risk of fluctuation in the game. But the above issues are something we could work on and improve.
One thing is for sure. The Spurs seem to be capable of forcing their style on us in the games. Often, some 1-on-1 offense is all what's left out there, particularly late in the game. Actually, middle of the 4th we got a couple good 1-on-1 scores with Hill. But after that, we lived and died with Nash-Amare. And Bowen like in most 4th q., defended Nash with an extreme positioning to the right, so that the pick would not result in an immediate good chance. It's a time when we needed some other ways to get an open shot, but there were no.
Also, double-teaming TD got us exactly where we were without KT manning him up in single coverage.
If we don't improve, we'd be again at a low odd to win in a series vs. them.