1st year is tough for any coach, and there's no denying McVay has a big job. But I think he's focused on two things:
Installing the playbook, and Goff. Gurley will be fine, and the OL is Kromer's responsibility. Not to mention the help he's getting from a vet like Whitworth.
WR's and TE's have significant room for improvement, and to be sure McVay will work on developing them, but they take a backseat to Offense Install and Goff. If he can get those two things moving, I think we will see improvement this year, and that's all we're looking for right now.
Don't forget about our lesser coaches- LaFleur, Kromer, and Olson will help carry some of this burden.
"Here lies a man who knew how to enlist in his service better men than himself." -Andrew Carnegie