We are using Fieldable Panels Panes, Panelizer and Workbench Moderation in tandem to build a site with a moderation workflow in which a draft of the entire page is created and then reviewed before being published.
It works well, except when a fieldable panels pane is edited on the draft version of the page, the edits automatically appear on the published version of the page too. This is because the panelized page references the entity ID of the fieldable panels pane and therefore always uses the most recent revision.
I propose allowing the panelized page to refer to the revision ID of the fieldable panels pane instead. That way the draft revision of the node and the published version of the node will refer to different revisions of the FPP when the FPP is edited, and everything magically works.