Balance is a necessity, had Kaka not played, I don't know how the team could ever move forward. Or maybe Seedorf would be playing second fiddle with Kaka or another midfielder next year ... I would think that is the best solution, cuz Seedorf is reliable in triquilista (spell) department, as he has proven this season (IMG:
http://cyrus.medialayer.net/~m1ke/milanfan.com/forums/style_emoticons/default/king.gif)
And we wont need to worry about any youngster fitting the bill, or taking any potential room from Gourcuff, cuz that kid is a brilliant dribbler, and we need to find space for him ont he team.