Ubuntu has 4 different GUI applications that manage packages. Each provides similar but different functionality. These utilities should be combined in a unified interface to eliminate the appearance of bloat, while providing an all in one center for all your package managing needs.
If you want to update the system while installing new software, you can do them together. Gdebi packages can be easily installed with other software from the repositories. Users won't have to open multiple interfaces for similar tasks, streamlining operation in Ubuntu.