This is on our roadmap. I’ll update when we have more concrete timeline.
Yes, an import should work across dashboards and shoud be available for any dashboard opened on the same machine. Saves a lot of time and also when you may not have an active internet and your data is on the intranet or the same machine.
I have a requirment which needs to see the change in "no date" numbers for previous months, which keeps changing, so I need only last column to reflect the latest data but also keep each previous month data in same visual. For this a freeze history kind of option would be great and how many record sets to freeze should be there for the user to create reports like last year or month or say particular number of records etc to freeze.
I just got a requirement that expects the same, they need a button on screen to export to excel. My suggestion here for this feature is that instead of always showing it, it should be on demand and can be placed on report as independent object tied to a dash.