Arsenal performance is not just good only in the Europa, arsenal are good in every league, they are one of the top teams in every league they are participating. Arsenal are aggressive in their games.
Yes, Arsenal this season has been extraordinary, because in the English Premier League Arsenal have only lost one game and one draw. On average, all other matches end in wins, so this can be a bit of an early conclusion that Arsenal will also dominate the Europa League this season until they reach the final. Due to the fact that it has been seen so far Arsenal are clearly very strong in all matches even though the match played today in the Premier League ended in a draw.