I agree with you and I think Arsenal will have a very tough fight. Not only with Liverpool, but also with City! Just because Pep's team didn't absolutely dominate one season, everyone now thinks their dominant days are over. Manchester City are bringing in some new players and have also let some old ones go, they are currently rebuilding the team and will play and fight for the title next year just like Liverpool.
Ask this question to all Arsenal fans, are Gunners optimistic about next season? They've always have it in mind to win games and become very consistent in stellar performance but I don't think they're ready for what's coming next season. So Mikel Arteta feels he's definitely going to be the only manager coming to compete in the EPL next season? Arsenal have been consistent when it comes to the EPL in the past seasons. They've been winning games but failing to lift a trophy. Liverpool, Chelsea and Manchester City will be crucial headache for Arsenal next season.