I'd say it's a good result for Madrid. A draw would have seen Madrid qualify for the quarter-finals. Therefore, Real Madrid did not need to win by a large margin in this match. I even think that the Madrid players played for a draw in this match.
From how they played, it looks like they played for a draw but it is a risky strategy because we saw that Leipzig nearly came to a second goal and only luckiness can help Real Madrid to avoid a second conceded goal. If Leipzig score that goal, the match will go with 30 more minutes for 2 extra halfs and maybe penalty shootouts.
Madrid did not attack much in this match. In the first leg match against Leipzig, Madrid played completely attacking. But in today's match, Madrid's main goal was to keep their defense strong. Leipzig played a completely attacking strategy today, while Madrid kept their defense tight and counter-attacked. We didn't see any goals in the first half because of Madrid's defensive play. If Madrid played attacking strategy, maybe we would have seen many goals in this match. Because Leipzig's players tried a lot to score. But Leipzig's players could not find any weakness in Madrid's defense.
I saw it too and Leipzig shown their strength against the most successful club in Champions League history. The opponent are still one of best candidates for Champions League title this season but Leipzig were not fearful, they simply played and enjoyed their own football style.