Changes will only happen with the clubs on second and third positions exclusive the first position. Real Madrid was able to manage with their poor form initially in Laliga, and they're still first on the table. Compared to now that Real Madrid is getting more stonger, and you expect that Atletico Madrid or Barcelona will dethrone them from the first position, I doubt it.
Though there's a whole lot of improvement in the Real Madrid team no doubt but changes are bound to occur at anytime which I believe you can still agree with me on that, though Realmadrid are always very strong when the come to this kind of position and I won't be surprised if they continue being at the top till the end of the season, so to an extent i agree with you on what you've said already, Barcelona alowed things to be like this for them if not we would've been talking about next season, there inconsistency made them not to be at the top of the league again and surprisingly Real Madrid climbed up the podium, as it stands 7 points is not a joke, though in the game of soccer result can change in just a seconds but i don't think such will happen in this case though time will tell.