Arsenal must be able to win the title next season. They already have a solid squad and they have been runners-up twice in the EPL. I'm not saying Arsenal should be EPL champions because that's quite difficult. But at least Arsenal can get one trophy this season. The Arsenal squad is currently in their best performance. I think if they fail to get the trophy again this will affect the players' confidence.
The previous season, Arsenal managed to advance to the quarter-finals before finally being defeated by Munich. I think it's already a good result but they deserve to go further in the UCL.