Barcelona is not yet balanced that is why they are not able to win big clubs but that doesn't make them to be weak team. Barcelona is still better than Manchester United in performance, Barcelona is in a better position in laliga while Manchester United is still struggling to be at the top.
We cannot compare the EPL and La Liga in any way because in terms of competition, the EPL is clearly much tougher than La Liga, where there are only a few clubs that are definitely on top each season.
This competition will still continue but when looking at the schedule it's still quite long I can't make any assumptions now because indeed we only have to see after the league restarts whether they are able or not to remain consistent.