I don't know if they're low, at least not on purpose; just cautious. I do think he has a good shot to make the playoffs with this roster. A lot of it hinges on Josh Allen, who I think will demonstrate a high ceiling.
Still a lot of new pieces to finish integrating into the system, so no gimme, imo.
Yes, McD does have a lot of new talent; how he develops the new guys and his coordinators work them into the schemes remains to be seen. I don't think McD is gone unless this year is a complete disaster, which I don't expect. I would like to see the playoffs, but if they go 9-7 it is no guarantee. 10-6 should get them there.