The easiest way to answer your question is emphasize that the Control Panel in the classic view provides "One Stop Shopping" for the host. Everything is contained within the control panel, and is easily and QUCKLY accessed by the host. The new GUI involves more CLICKING around with the interface. It's a step backward for host 'productivity'.
But I recognize that mgmt is heavily invested now in the new GUI, so there is no turning back. I'll probably have to cancel my subscription once mgmt forces me to switch over. I know two other instructors who use GTT who feel exactly the same way as I do. Thanks for listening.