I think Arteta and Arsenal are going to win the EPL soon, it might not happen next season; but i think they are getting closer to finally becoming EPL champions once again, after a very long time. They should have done it last season, but City were unbelievable, as they mostly are every season, i expect City to win the EPL again next season, but if Arsenal continue to appear in the picture regularly, they'd win it soon. I am very impressed with Arteta and the confidence he has, he played a vital role in Declan Rice joining Arsenal, players are beginning to believe in his Arsenal project, and their success is coming soon.
I also believe that Arsenal will be able to win the EPL Trophy under Arteta tutelage because Arteta has built a squad with the potential to win the title. Arsenal just need time to establish themselves as EPL trophy winners. For now, we have seen how Arsenal players are trying their best to win the trophy. Arsenal squad is filled with young players so Arsenal can make a stronger move if their players already have the mentality to win the title.
Yes next season we will see a new adventure for Arsenal where they will have quite a schedule on from the EPL or Champions League. So Arteta must be able to arrange the squad well in this transfer window. Even rotation becomes an important part when they have a fairly close schedule of games.