It was very encouraging to read your opinion that Noni is PSV's best since Robben. If anything, he looks more explosive in his final movement to create space and get his shot away. Noni also clearly has super timing and so strikes a ball very, very, cleanly.
For me Arjen was smoother and more heads up when carrying the ball. This made him a triple threat in attacking areas; create space for a strike at goal, dip a shoulder and head towards the goal line to deliver a cross, or pick a pass to a running teammate. Manduke may share this versatility, but I haven't seen it demonstrated as yet. I understand however that you are not claiming the youngster to be on quite the same level as the legend. π
This is exactly the issue. Ajax may be particularly aware of Noni's propensities, but I'm sure you'll agree that all opponents will have some knowledge of them. What he wants to do will show up glaringly when sides watch film in preparation to face him. They'll be ready for him so, as you say, it will come down to whether or not they can stop him. If he remains predictable stopping him can only be easier than it would be if he was less predictable, if he had more strings to his bow. π