Filter section but not dashboard

Not sure if this will work, but you could maybe try checking in the getFilters method which view the user is on, and if it's the dashboard view then don't apply the filter? Never tried this so not sure if it's too late at that point (or if it retrieves the data again when switching views or not)

To check if user is viewing dashboard view:

if (this.getActiveViewName() === "AnalyticsDataView") {
    // user is on dashboard view
}

I think you can override changeDataView to force it to reapply the filter (and retrieve data again). Something like this: 

changeDataView: function() {
    this.callParent(arguments);
    if (this.getActiveViewName() === "AnalyticsDataView") {
        this.sandbox.publish("ReloadDashboard", null, [this.sandbox.id + "SectionDashboardDashboardModule"]);
    }
    else {
        this.updateSection();
    }
}

Ryan