Using Yast software manager is somewhat not excellent due to usability issues.
1. The whole list of all available packages (from all installation sources) should be visible by default.
2. It should be possible to narrow down the list by applying various filters.
3. Filters should include: 
---- category (Base, Multimedia, Games, Development, etc.)
---- status (installed, not installed)
---- action requested (marked to be installed, marked to be updated, marked to be uninstalled)
---- dependencies (all packages the selected one depends on)
---- package name (each application is identified by some short name, for ex. mc, wine, k3b, etc.)
---- keyword (search the given string in the package descriptions)
---- provided files (ability to find the package the given file belongs to)
4. More detailed package information should be available, for ex. the full list of all files the package provides.
5. Remove the annoying "Install more software?" modal dialog. It requires extra click with no value in turn.