Arsenal must immediately introspect after losing to Everton, the bitter pill that Arsenal swallowed at home to Everton was the second defeat that befell Arsenal in the Premier League this season. Arsenal are still at the top of the standings despite having just dropped three points, but Arteta needs to be wary of the threat from Manchester City as the distance between the two is getting closer.
Everton played very well, even though before the match it was predicted that it would be difficult to get points from Arsenal, the struggle and enthusiasm of the Everton players had made Arsenal lose important points to get away from Manchester City. Arteta needs to encourage his players to avoid making the same mistakes in the Premier League to keep their chances of becoming champions this season.
As for the results they actually received, this wasn't too much of a problem and wasn't something bad either. The current point margin is still 5 points and let's just say they just threw away the remaining matches which failed to be maximized properly.
Their position is still secure until now and I don't think it's necessary to bring it up too much because losing in this case doesn't mean everything is over for them.