It's crazy to expect 10 wins, but it's not delusional to think it's possible if they have a good draft, add a few good mid-level free agents, and have better health.
I think it's far from likely and I think they end up in the 7 to 8 win range, but I don't think it's delusional to think there is some small chance they could turn it around and get to 10 wins. The NFC South is terrible and the vast majority of NFL teams are in the middle with parity moving teams from the playoffs to out year to year. And, in the end, if we think DA was really a bad coach, and we all do, then you would have to think getting a better coach improves the record by a game or two alone. Otherwise, was DA not a bad coach?