The closing part of the league hasn't been good for Arsenal at all maybe but indeed they still had a wonderful season in general. Finishing a Premier League season at the 2nd position is a big step forward for Arsenal because we haven't seen them in the Champions League for a while as well. Arteta will need to build a squad and prepare his players special to the Champions League as well from now on.
Manchester City have made their title official after this loss by Arsenal as well. Now they can only concentrate on their Champions League finale against Inter. There is a big opportunity to make double for them.