Only Barcelona have a perfect points so far (9 points from 3 matches), no one would be wrong to expect them to become La Liga champions this season, but that's too soon to say, we haven't even go to the first El Clasico of the season yet, so even though Barcelona are currently having a good run, we can't know how they will be after that.
About Barcelona's match against Rayo Vallecano, I thought Olmo played well, it's a shame he didn't play from the start, maybe if he played earlier we could have seen Barcelona's third and fourth goals.
I like the way Barcelona plays, they control the ball well and by the way they could have scored a few more times in the second half and I think the goal that the referee cancelled was a wrong decision, but the most important thing is that it did not affect the final result. Yes, Olmo has fit into the team very well, I even remember him more for his long-range shot into the crossbar, it was very beautiful, and Lewandowski is also in good shape by the way. 9 points is good, it is too early to draw any conclusions, but it is good that they are moving so confidently, and Real will go to Las Palmas tomorrow, an unyielding opponent, especially at home.