Utility might be a stretch, but either way he doesnt deserve #10, as this number is traditionally for us and other Italian clubs closely related to position on the field rather than someone's merits. DP and Tevez, the former especially deserved this number due to position they occupied on the field and the offensive output they provided this team with week in week out. Attaccking mid/TQ or creative SS (DP, Baggio, Tevez) traditionally were given it and I dont see any sense in changing it to accomodate someone only because he has been here long enough, eventhough he has been loyal and had moments of excellence during his spell. In the same way only striker will be handed #9 and we certainly wont consider defender, or mid for this number, no matter their status.