Improve your team

If you could change one trait (physical or skill - i.e. not attitude) for each player on your team what would it be:

Celtic

Boruc - catching crosses
Wilson - crossing
Caldwell - heading
McManus - pace
Kennedy - pace
Naylor - crossing
Naka - pace (10% quicker and he’d be sensational)
Aiden - nothing to change
Brown - passing accuracy
Donati - pace
Hartley - passing accuracy
Jan - pace
McDonald - passing accuracy