1) Don't reset the form each time a change is processed. The Service details section of this dialog resets with any change to the Limit details or Code filters sections. This isn't helpful when changing multiple rate codes.
2) Order the New rate code drop down list alphabetically by rate code to make it easier to locate the new rate code. With over 200 rate codes, it's challenging to find the one needed when the list isn't in any particular order.