I think Barcelona are just lucky to be in a less competitive group, facing no threats from teams, rather they keep their high voltage in every match they play in UCL but for La Liga matches, it's definitely going to be a tough struggles for them, losing yesterday in El Clasico against Real Madrid. Barcelona will qualify in their group H because there's no entertaining actions from their opposition. I'm scared Barcelona will not do well this season, having absolutely nothing to offer but due to injured players in the main team. Xavi Hernandez will create path for his team because he's keen on achieving good points on the table.
There are no injured players currently playing for Barcelona who will miss the entire season due to their condition. So, if Barcelona's downfall is dependent on those players, they will do well this season because the majority of the players will be returning shortly, keeping the morale in the team strong.
What worries me the most about them is the present champions league competition. Barcelona's success here is not always consistent over a long period of time; they are currently performing well in the group stage, but this does not guarantee that they will continue to perform well until the end of the competition. In La Liga, where they perform much better, they recently lost to their main opponent, Real Madrid, which is not a good sign. I simply believe they have a better chance in La Liga than in the Champions League.