There is a couple of reasons there. Basically, NetWorx and NetGenius have a slightly different purpose:
NetWorx is one of our oldest products, it has been perfected for nearly two decades. Back then, Internet traffic was slow and expensive, and to be able to closely monitor data usage, precisely count downloaded megabytes, and receive detailed reports was important to many users.
These days, many users have data-rich or unlimited plans and are generally less interested in how much traffic they use, but more concerned with how fast their connection is and how much privacy control they have over each application, as almost every modern application tries to connect to the Internet and exchange some data. This is what NetGenius focuses on.
NetGenius is our new product, built from the ground up, with simplicity in mind. Over time, it will get more features, including better reporting. We appreciate your feedback and will definitely consider it for new releases of NetGenius.