I agree that he misses Kev. But he's one of the most elite strikers in world football - if not THE most elite - so he shouldn't be solely dependant on one player's brilliance to perform.
If he is, he's fucked because Kev is one of a kind.
For what it's worth, I don't think he is that reliant on him. He's just not found by other players because they're not willing to take the risks that De Bruyne does on the ball. We either need to find somebody who is (Foden does, Musiala/Wirtz etc.) or tell the ones we have to look for him more!