It appears that in Illinois there are more than a few injured workers who change their lawyers.
My take on this is that it is better to stick with your first lawyer because changing your lawyer delays your case. Your goal, of course, should be to settle for a fair amount in a timely manner.
You may have to change lawyers if they will not talk to you, or they refuse to take the case to trial if you tell them that is what you want.
However, most problems can be worked out if you are willing to talk with each other. Remember, both the lawyer and the injured worker want a fair settlement. It usually boils down to communication. If you can talk with each other, most issues can be resolved short of starting over.