I didn't have high hopes for Arsenal. I think it's great that they're even at this level right now. I see their chances to be the fourth team of the league more than other teams. They will need to set up a squad as ambitious as to be the champion next year. If they are not aiming for a championship, they should go to the highest level possible in the champions league. For that, they must secure fourth place after Manchester City, Liverpool and Chelsea.
I don't think Arsenal deserve to be fourth in the points table. Maybe Arsenal's performance is good enough now. They can play well. However, Manchester United's squad is much better than Arsenal's. Although West Ham and Leicester are irregular, they are good enough. At the same time, Tottenham's Kane and Son are back in form. So coming in fourth place in the table is now becoming much more difficult for Arsenal.