The issue with changing the agent screen design is the sheer amount of work it takes to do it. There are over 100 spans in the vicidial.php code, and hundreds of buttons and other images have been created that would all have to be redone if the interface is changed significantly, and nobody wants to pay for those changes to be made. I think we've quoted $17,000 to do this a few times before based on an estimate of 100 hours to complete the work.
The issue with designs we've received from graphic artists is that they are usually designed for very large desktops, usually a minimum of 1600x1200. We even received a design that was for dual-monitors that was over 2400 pixels wide. Because of the large number of clients that we have that are on agent machines with a low maximum resolution, we have set our minimum design standards at 1024x768 and we have yet to receive a functional design that will fit within that.
We are certainly open to a redesign, but since it will have to be unpaid, it will be a while before it happens. For example, chat was unpaid and it took over 20 months to complete