Arsenal players did well in this season, because they took a good position from the beginning of the tournament that made them to lead the premier league table for a long period of time before Manchester city the giant of premier League competition took over from them to win the title. I think, Arsenal will still going to play well next season, because there will be some challenges among other teams that will make the premier league title to change for another team to embrace it next season, because Manchester city will definitely experience some challenges before the end of next season. If Arsenal manager can include some potential strikers among the new players they are bringing in this season, I think they will not going to end next season in a second position than to win the title.
Arsenal looks better because the team's progress continues to move in a positive direction, but whether or not they win at the end of the season is not only determined by the team's performance, there are several factors, one of which is mentality and I think that is a strong reason. they cannot become champions because mentally they are no better than Manchester City.
If you look at the progress they are going through, of course for next season Arsenal's performance can be even better, but winning the Premier League title is not easy, this is the most competitive competition.