Babel is a talent, but nothing more at the moment. He's a little bit too arrogant, and he really has to work on a few points to make it at Ajax. His ballcontrol is very bad, and he ain't consistant enough. With some good training, he might be a good player in the future, because he has potential, but at the moment he's pretty useless.
Maxwell is a beautiful player, his technique is marvelous. The only problem is that he is not a defender. He could be very useful as a midfielder, or as a wingback if he doesn't have a real opponent.
Beautiful midfielder, but not a defender.
this is the best formation for Ajax in my opinion:
--Pienaar/Mitea--Huntelaar/Babel----Rosales/Mitea--
---------------------Sneijder--------------------
---------------Lindebergh---Galasek-------------
-Emanuelson---Heitinga--Maduro----Trabelsi-----
-------------------Stelenburg-------------------
This ain't the best formation for Ajax, that's for sure. Pienaar is a midfielder, he lacks speed and a cross for being a winger. Beside he's only rightfeeded, something that Rosenberg is not.
A midfield with Lindebergh and Galasek is so boring. Galasek is really at the end of his carreer, and he totally doesn't fit at Ajax. Maduro is more talented and has more offensive impulses.
So Maduro shouldn't play as a defender, simply because he is not a defender. He makes to many mistakes as a defender, and he doesn't have enough influense on the team. Grygera should be in his place. Heitinga and Vermaelen are more or less the same, so that doens't make much difference.
BTW Mitea is more al player you have to bring in the last 25 minutes, when the opponent is tired. That's the best way to utilize his speed. If he starts the match, he's normally a little bit too light, especially in Europe.