Messi is still fast that he hasn't the endurance to make a lot of sprints.
He can still make the difference in this team due to his amazing technique.
The reason why Barca do not win a lot of title isn't Messi but the problem is in other positions.
If only my messi is relied on, then I'm sure the team will not be strong in defense and still other positions need to be applied accordingly. Barcelona only relies on Messi's attack with his best tactics but I don't think that's enough to win titles and even lose many titles.
If Barcelona are still keeping it then there needs to be a change. I'm sure Koeman can do this and win again as expected.
koeman is a good coach . We don't know what his plans are for the Barcelona team . Barcelona's defence line up is just worse now . They needs some good defender . On the other hand ,Barcelona had some good mid fielders. But Barcelona's management has release Rakitich and Vidal from the team . we don't know Koeman will choose whom for replacement of them. I think in this season , Barcelona team will fully dependent on Messi . Obviously Messi is a legendary player . We always expect a lot from him . But a team can never get good results in one's performance . All players need to play well from their own position to win .