Instead of the empty default application start page it would be great to have the application menu entries as tiles (see attached screenshot). This is more intuitive for most users.
Each application menu entry already has a caption, icon (font-awsome is scalable), description that could be displayed on the start page. If a hierarchical application menu is configured the tiles could have many levels that the user can click though. Or even make it configurable for each entry if it should be also displayed as tile.
P.S: I know its possible to customize the main window by my own, but maybe it would be a cool product feature