After losing a pivotal Game 5, the Spurs found themselves on the edge of elimination. The Nuggets appeared to have figured them out leaving the entire season to hinge on Game 6, which is why many were hoping for some big adjustment that could change the series.
Fortunately there was no need for a magical tactical move. Pop did make a couple of relatively small tweaks that ultimately worked, but the Spurs still needed good fortune and an outlier performance to equalize the series.
Game 6 was proof that adjustments, as fetishized as they are in the playoffs, can help,but are not enough on their own.