In addition to these changes, here is some CB advice
Place Vasher on the faster WR in a game. Place Tillman on the slower one.
When the other team is in the red zone, put Tillman on the taller/hands/spec. catch reciever since he is stronger, shut down corner, and press corner.
Vasher is smart and almost aa shutdown weapon. he isnt as tough as Tillman though.
For the spec. catch reciever int he red zone, it is harder for the reciever to bring down the ball without Tillman knocking him over.
Example:
Bears vs. Colts
Put Vasher on Harrison and Tillman on Wayne
In the redzone, put Tillman on Harrison and Vasher on Wayne