Are you sure we don't need to worry about Barcelona? Have you counted how many Barcelona players got injured? There are 6 Barcelona players who got injured, it means they are not in a good condition now. Sadly, those 6 players are mostly the key players for Barcelona squad. If they often get injured, it may ruin their performance. Those players will be difficult to maintain their good performance due to injured problem.
Anyway, I think you too underestimate Girona. They played quite consistent so far, they started this season perfectly. Although they got 1 defeat, it doesn't mean they probably easier got more losses. In reality, they still can maintain good performance.
La Liga becoming tougher to anticipate and have basically full game competitions from both elite and mediocre teams. It's only matter of time to decide the most outstanding club currently to lift La Liga trophy this season. Underrated Girona because it's an average team and praising Barcelona to win La Liga league title this season would be quite challenging for them. The blaugrana are face with challenges this season, from problems from the finance sector to the players who have sustained long-term injury, some might come back in extreme incredible shape while some can not be able to meet up the top expectations from fans.