As long as he steps in and corrects the horrible end of game decisions we made, this is fine.
Examples:
1) Never take your two best WRs off the field on 4th down with the season on the line.
2) Don't let your 90 million dollar RB come off the field on critical 3rd and 4th and 1's because he's tired.
3) If your QB is hot and your running game is not, don't run it twice and then throw an out to your back as the first read on 4th down.
Not sure who is responsible for those decisions between Garrett and Moore - but I do hope McCarthy gives us some competent 4th quarter management.