I do FF support on Twitter. Lots of people got upset about RSS bookmarks. Some like livemars, some don’t and have some bitter taste in their mouth for each removed feature.
Why was livemarks removed? I mean besides maintainability. What change triggered it? For example you can say that the XBL removal triggered this or some WebRender work. Something that works should never be removed. Something that needs to be ported/converted should be removed.
What should I tell users when they complain? What awesome feature that is brewing triggered this change? All refactoring/scope removal has a purpose. What work was avoided in the immediate future by removing this?