As to next season's Liverpool: No one has proved yet that they are better than the Alisson/Robertson/Virgil/Gomez or Matip/ Alexander-Arnold/Fabinho/Henderson/Wijnaldum/Salah/Firmino/Mane side if they are healthy. I SERIOUSLY doubt that Klopp wants to fool around with that. BUT:
That Midfield IS getting old.
The only CERTAIN way that Liverpool can get more powerful is by getting a centerback of near Virgil quality. That's the only reparable occasional weakness on this team. Admittedly, A-A is a poor defender, especially on the back side of the play, but that is not reparable since he is so fantastic elsewise. Only an All-Star replacement for Gomez/Matip improves the side.
So, what's all the midfield talk about? To my eye, ANYONE (right up to the best --- De Bruyne) cannot help Liverpool unless they will play like Henderson and Wijnaldum play. They must be instinctive defensive midfield hawks, ball-stealing physical hawks, and ready to run hard all day. Maybe this Thiago plays like that. If he doesn't, give me Wijnaldum out there and let the Klopp Press roll.