I never thought I'd say this, and I mean this as a positive, but Bernardo has all the tools to be a world class... Water carrier.
Technically he's outstanding, his workrate is unmatched and his energy levels are immense. He's no idiot by any stretch, but I don't think he's on the level of David, KDB, or Gundogan (or Rodri from what I've seen) as far as in game intelligence is concerned, at least as of now. Having him play a deeper, completely unselfish role where his main job is to provide support for others does not bring the best out of him but it brings out the best in so many others. Mendy, Otamendi, Gundogan, Sterling, and De Bruyne ALL benefited from him.