if we have to use the 2013 "new and improved" material or appearance editor:
i would suggest the ability to multi select / edit / delete items.
even deleting items from these editor windows does not give keyboard entry to delete or otherwise.
it seems we have some cross over from the different software developers cross pollinating the categories of software bundled into the Suite more and more. some of these ideas are good & nice, but if we are to adopt the changes then let us not get rid of functionality that we already have. multiselect and keyboard access would help.
even the terminology of some of the functions could be adjusted eg:
pre 2013 version function to save a style back to the style library=
-via rmb context menu was: "save to style library"
2013 version =
-now via rmb context menu is: "save to"
then...
choose sub menu, choose sub menu(s)".
so if you are going to change the functionality, at least use a command name such as:
"save to (style library) within:"
>fly out options.
ie please try to have provide some level of familiarity and workflow & command access cross over when you are making your new interfaces and commands.