Yes, last season was not so tight competition in La Liga. Real Madrid can be said to be easy in the race for the throne. Almost all teams in La Liga play not so consistently. But for next season, Real Madrid must be wary of the rise of its rivals. Barcelona is predicted to return to being a superior team and seems very ready to challenge for the title from eternal rivals Real Madrid.
I also see Barca have a chance to compete with Madrid. and it will be even more interesting for La Liga fans.
Barca seems very confident for this season with some of their new players. but rivaling Madrid in the domination of La Liga will be quite difficult. Madrid will be very strong for this season. and Barca who are still trying to improve their game with a new squad.
Real Madrid already has what other teams don't have at the moment. As for Barcelona, as you said they still need to be able to mature the game from the big changes they made. Because it definitely takes time to create chemistry between one player and another. But Barcelona have the advantage, because they are managed by a coach who knows Barcelona's plight.