Last season Arsenal managed to reach the quarter-finals, where expectations for Arteta's fleet were actually quite good, but in the end they failed at the hands of Bayern who were experiencing setbacks. Madrid, City and Bayern next season will be the main forces in the race for the trophy, and other candidates such as Arsenal are behind them. Arsenal's main priority is the Premier League, even though they are still trying their best in the Champions League, it is quite difficult to appear balanced in every competition.
This season is going to be entirely different from the previous one because Arsenal will put in more work for improvement and also keep close sights on major titles. The UEFA Champions League is not for newbies but for elite clubs that have stand their ground and knows basically what they need. Arsenal tried their best but couldn't coupled up with the outstanding performance of the club. It's been outrageous for Mikel Arteta and Gunners perhaps he's one of the promising coach to lift the burden of the club since the departure of Arsene Wenger.
It's not just Arsenal who will try to improve their performance next season, but all teams will also try to do that, but what you have to realize is that the competition to win the Champions League title is always fierce, all the best European teams will do their best here, but for Arsenal I think they Still won't be a favorite despite Arteta who has built this team to be even better, but Arsenal's mentality is not yet good enough to compete with Europe's top teams.