That way will just force the water into the end grain of the joists though.I rip the ledger down 3/4" narrower than joists, cover with tape and install ledger flashing over tape. No deck boards sit on top of my ledger flashing.. Flashing has a 10 degree slope on it.
Flashing and a deck board sitting in dirt, leaves and other isn't much better. Im in a saltwater environment so flashings fail faster when they stay wet with Atlantic and Chesapeake water mixed with Live Oak leaves and people dirt.That way will just force the water into the end grain of the joists though.
I don't have an issue with the deck boards sitting on the flashing, I just don't put any screws through the flashing.