In fact, Manchester City's performance this season is not very good, they are always left behind and have not been able to occupy the top position for quite a long time, it's just that the mentality and fighting power of the Manchester City players is very different from other teams and they are very ready to fight until the final match.
In my opinion, next season the competition will not change much. Arsenal and Manchester City will again be involved in tight competition and the Gunners will even be more expected to be able to break the chain of champions from Man. City. However, all Premier League participants must admit that Pep Guardiola is always the difference.
Manchester City performance at the early season its not quit well but they have winning mentality for securing three points on crucial matches difference with Arsenal although success leading the first standings more longer than Manchester City got failure after inconsistency performance on crucial matches. Its not problem for who are longer on the first standings position place but most important who will lead the first place at the last games week, Manchester City did it in this season although failed lead the first position standings in the early season but success finish on the first position at the last game weeks.
Next season seems more interested for Premier League tittle race because some of team arrived new manager from Liverpool and Chelsea will bring new tactician than old manager. I think next season Premier League tittle race not only dominance by Manchester City and Arsenal but also has Chelsea and Liverpool will be strong competitor teams.