Yes Arsenal keep improving in every match. Although the result did not truly reflect the outcome of the match. But Arsenal dominated the match from start to finish. They should have ended 5-1, but 3 points matters. At this point I don’t think is going to be very easy for other teams to beat Arsenal, they really got the winning mentality and once a team has that they give their all.
His form this season has really improved a lot compared to last season so it's quite natural that there are some people who will make high expectations about this and I'm probably one of them quite confidently saying they will compete in the top 4.
Arsenal are very strong after opening their season with five wins in a row and now they sit pretty well at the top of the Premier League table. The presence of Gabriel Jesus this season has changed Arsenal's attack line, he is really very reliable by Arteta. Meanwhile Oleksandr Zinchenko and several other new signings have added so much quality to the squad. Both made a drastic impact after moving from Manchester City. But despite being able to make a smooth start at the start of the season, Arteta shouldn't be too proud of his team, as they haven't really found a worthy opponent yet.