The execution late and lack of a timeout call are definitely fair things. But overall, the fact that they blew a 22-point lead AND lost without Mitchell + Strus and others to me is the bigger story. Even if they won close it might not have looked as great.
With that said, who really cares? They are still 7.5 games up on the 2 seed and at this point I think the bigger priority is health. I'm not making excuses for them but it is a long season, sometimes teams coast and they simply won't bring it every night. The 73-win Warriors team still lost 9 games during their season. It happens. To me it's really a problem if they now lose 2-3 in a row here.