I think this year Barcelona has shown is in much better form than last year,they are doing quite well in La Liga and they only failed in Champions League against Inter and Bayern Munchen which are strong teams,much stronger than the actual ones in the Europa League.
Of course, if you look only at Barcelona's failure in the Champions League, the potential in the Europa League will be a little different. Barcelona can be more daring to compete because after his failure in the Champions League Xavi was determined to maximize the opportunities that exist today. Competitors in the Europa League are not comparable to clubs that have now qualified for the last 16 in the Champions League.
In my opinion, the opportunities for Barcelona in the Europa League are much more open.
Perhaps it will be easier for Barcelona to do well in the Europa League than in the Champions League. However, winning the Europa League title will not be easy for Barcelona. Because there are strong teams like Arsenal and Manchester United. Barcelona's squad is not weak. Then competing with these teams to win the title is very difficult. I think this season's Europa League will be very competitive, just like the Champions League.