This is as of today already possible. If you look on https://gridcoinstats.eu/block you have the column "Recievers - Volume Sent Coins".

This column shows how many addresses that received a payment from someone else (it wasn't minted coins with PoS/DPoR) as well as how much the volume was.

I will however, make this much more clear on the new page. I will also companion it with some better interactive graphics