I think PSG will win the League One title this year as well But securing this title will not achieve much PSG should aim for the Champions League.
PSG is the most favorite team for the title in Ligue 1 this season. Even Taru is not certain that PSG will win the title. Due to this, their performance cannot be said to be stable till now. They drew the first two of the three matches and won the third. PSG's performance has been erratic. Especially their attacking performance is still weak. If the attack is not strong, PSG's chances of winning the title will decrease.
PSG's main rivals for the title this season will be Marseille and Monaco. And the performance of these two teams is quite good. Marseille have won two and drawn two of their 4 matches. Monaco, on the other hand, have won two out of three matches, and will win today's match as well. PSG are now eighth in the table. Topping the table won't be easy for PSG.
It is probably more about the persistence of their contenders than about the performance of PSG, because I don't think that PSG will hit the floor at full speed and lose every second game or something. In a bad season they still will win enough points to win the title in Ligue 1,
unless there is one team that can really take the competition to the next level and this is what it will come down to.
You can already see that there is no single team thus far that could manage to win the first four games. This gives PSG already some room to breath and that is the problem if PSG is supposed to be beaten. Despite their relatively bad start they can win one win be in second position and nobody would really complain because once they solve some of their problems, they can hardly be stopped again. It needs a team that exploits PSG's weak times.