As long as Barcelona are leading by less than three points and until they meet Real Madrid head-to-head, bookmakers will continue to rate them as clear underdogs against Real Madrid (which are still priced at ~1.50 even after dropping points). The fact that they have 9 points is not bad, but you can’t say that they are winning confidently - three minimal victories and in every game they are conceding goals.
Expect competitive run for the La Liga title this season, it's going to be amazing one because we have Barcelona, Real Madrid and Atletico Madrid, these clubs didn't sleep on because they made tough signings in the transfer window. Conceding a goal this time, it would be a top challenge for any Barcelona opponents because Barca is build with formidable qualities and tactics. Hansi Flick knows exactly what he's doing and not stopping. Barcelona will continue to lead on top of the La Liga table because they've the required positioning stands, with Hansi Flick empowering the squad with the fiercest game style, a more comfortable condition for La Blaugrana.
I think 3 matches are not enough to say for sure. At the end of 10 matches, we can make more successful comments about Barcelona and Flick. Real Madrid expectations were high in La Liga this year, but we saw in the first match that they are losing points. If they experience another loss like this, Real Madrid and Barcelona can be ambitious for the championship. I think they will definitely get stuck somewhere. The competition is between two teams that will be at the top. Maybe Atletico can join them of course.