Drag and Drop for states and plugins
Paraview can handle drag and drop for data files (great feature) but not for state files.
Also make drag and drop working for plugins. (copy the plugin file to some safe place .config/... and check the Auto Load). This can make using plugins much easier for new people.
And have a central place (wiki maybe) with a list of the community plugins (compiled or in source).
Great job and Merry Christmas to all.