1) Request to add the option to show this detail into a line chart or something else that can be useful. I guess on a one - 3 site system this is ideal. But if you look at the attached image, you will understand.
2) Even if this can be the default of no site selected, or remember what sites were selected last time after login out and back in the next day
3) Grouping of certain sites into one select will also be very helpful e.g. Country, Region, City
