I am working on an office.js add-in that has more than one task pane. Each task pane has a different icon in the ribbon. but when I open more than one task pane I can see the same icon in the panel to the right (the Icon of the entire add-in as defined in the IconUrl tag in the manifest file).
i.e. two identical icons in the right panel:
I think that the right panel should allow different icons for different task panes and also different hover text to match the task pane content.
actually, the "My addin" header should be allowed to be task pane specific (or prefixed by a prefix that is relevant for the add-in)
In summary, it will make it easier for the user to distinguish between multiple task panes of the same add-in.