Barcelona's condition, which is not at its best, raises a little doubt that this team can survive longer in the Champions League. Barcelona may be able to beat Napoli who are slumping in Serie A, but will struggle when facing tougher opponents in the next round. I believe anything can happen in football, if you look at the performance of other teams such as Real Madrid, Bayern Munich and Manchester City it will be difficult for Barcelona to get rid of these teams.
With Barcelona's current condition, I even doubt that Barcelona will be able to beat Napoli in the last 16 of the Champions League even though Napoli themselves have not been good so far. Moreover, to get rid of other top teams such as Real Madrid, Bayern Munich and Manchester City, it will definitely be much more difficult for Barcelona with their condition not being good. Because the most logical thing for Barcelona now is to try to stay in the top four of La Liga for this season rather than hoping for more in the Champions League.
Do you think it's unreasonable for Barcelona to expect something better in the Champions League this season?
I think Barcelona have better experience in the Champions League than Napoli and that's an advantage you're basically ignoring. I don't understand why you think Barcelona don't deserve to get what they want in the Champions League while fighting for the La Liga title.
Considering the quality of Napoli's play and performance this season, Barcelona should easily qualify for the quarter-finals instead of failing. I am optimistic that Barcelona can win a ticket to the quarter-finals, but regarding the semi-finals it really depends on who they will be playing against. So don't underestimate Barcelona because nothing is impossible, unless you are in the opposing camp.