Ideally export and push functionalities should share the same dialog for fields selection, as they provide the same function.
Export dialogs are still looking quite repelling. If it is not feasible in near future to replace them with push dialogs, they should at least have their ui mimic the look of push dialogs.
Unlike Push dialog, the Export dialog should open with all sections collapsed and all selected. Please see the attached screenshots. Please note for Excel export "Clinical symptoms & physical findings qualifiers" option needs to be added.