Without star players, La-Liga would never be interesting again. Ronaldo went to Italy, while Messi had to leave due to financial regulation. I don't know what made me have to watch Barcelona again, while there is no substitute that really deserves to be proud. I know it is difficult to find a replacement for Messi at Barcelona because he is a player with natural abilities. There should be a worthy replacement for it, but so far I haven't seen it born there.
Aguero and several other players may be able to replace Messi's role at Barcelona for a while provided there is another suitable replacement. I still want Neymar back, but it seems impossible for Barcelona to buy him back because Neymar is also one of the players with big salaries. Barcelona is a complete Messi and Laliga is getting worse after some of its superstars moved team. Barcelona would not have won the title this season without Messi, he is the team's all-time top scorer.
I can't imagine how lonely the El Clasico would be without Messi and Ronaldo. Totally unforeseen circumstance occurred in Laliga and Barcelona before the new season started.