I have not been able to find a way to change the order of roles within the workapp once they are created. It would be beneficial to have the opportunity to change the order of the roles within a workapp once new roles are added to allow for the most important role to be seen first when you enter a workapp followed by the next important role, etc. It is unprofessional if you have a Home role acting as a landing page, but this does not appear as the first role when you enter the workapp.