Package: task-kde-desktop
Version: 3.69+rebuild
The default sddm theme on most distributions running the KDE plasma environment (and the expected one for a majority of users) is the breeze theme, as it provides a more integrated user experience, as opposed to Maui or Elarun.
sddm-theme-debian-breeze should not be a hard dependency of the KDE task, but should be recommended and this pulled in with the default apt configuration. sddm-theme-debian-breeze was chosen as opposed to sddm-theme-breeze as it is branded by Debian.
Additionally, the package should be made a recommends of task-kde-desktop as opposed to sddm as most (if not all) of its dependencies will already exist on a KDE desktop, but be missing in a different environment (such as an LXQT desktop, which also defaults to sddm), and serves the sole purpose of better integration with the default KDE Plasma theme.