These are the six teams that have been confirmed to qualify for the round of 16 and their journey will definitely be easier in the remaining group stage matches. Bayern Munich, Real Madrid, Inter, Leipzig and Manchester City are regular teams in the top 16 and perhaps seeing Real Sociedad's struggle so far in qualifying with this strong team is certainly a good record for them after being absent from this competition for so long. Real Sociedad managed to eliminate Salzburg and Benfica from Group D competition and they succeeded in placing themselves at the top with the same points as Inter. Real Sociedad's performance in the domestic league and champions league is equally good and they deserve this result.
This means that they can rest their players until last 16, that's a good thing, they could lose the last two games and rest, and that would be as good as it gets. I get that sometimes it doesn't look like that and we look at something and think that they have to still take it seriously because there is money in the end, but most of these clubs are rich too, they do not need the money that they get from wins, they could just rest their players and not risking any injury feels like that would be a better situation for them in the end.