Sadly indeed. Football has changed and still changing, and unfortunately it requires a lot from strikers - to hold up the ball open space for teammates and not to pass the ball as soon as he receives it if his mate isn't well placed and marked etc...
Personally, I think David is capable of holding the ball, controlling it when needed but he doesn't like it, I've seen few moves of him outside the box which I'm convinced that he's capable of doing more than just scoring inside the penalty area but he's not into it.
Anyway for the formation we are using or playing right now, Amauri fits more, but the moment Del Piero is back(which is very soon), I want the old partnership.