Lampard's interview after his first game last year included the following comments about Van de Beek:
"I brought him here because of his talent in terms of his play, his intelligence and his work ethic...He looked confident on the ball and that's exactly what I brought him here to do...I think he can do different roles and that's the beauty of him and why I moved so quickly to try and get him when I came in...I'm a big admirer of him as a player and I think he can do both roles for us. He played as one of two midfield players today and I know he's got the talent to link and get us through the lines of the pitch with his passing, and he also has the work ethic needed in that role...that's one of the big pulls of me bringing him in, knowing that he can bring different elements of his game to help us in different ways."
So Lampard definitely had a part to play in at least one, and it sounds like it was a lot more than just signing it off too.