I mean, most of what I said in the thread you bumped in January to try and raise this same concern about BJ Ojulari remains true: it's foolish to expect early production from a tight end. Tight ends historically take time to develop, even the real good ones. McBride was and is well ahead of the historical developmental timeline for the position.
That said, this is NOT the care for RBs. Here are some successful 3rd round-or-later RBs of recent vintage and how they performed in the first three games of their rookie campaigns:
Alvin Kamara - 10 attempts, 58 yards, 1 TD, 10 receptions 76 yards.
Kyren Williams - 1 special teams snap, 2 DNPs
Rhamondre Stevenson - 1 att, 2 yards, 1 reception, 9 yards, 2 healthy inactives.
James Conner - 5 att, 20 yards, 12 offensive snaps
Brian Robinson - 3 DNPs
De'Von Achane - 19 rushes, 208 yards, 4 TDs, 1 healthy inactive
Aaron Jones - one healthy inactive and 20 special teams snaps
Devin Singletary - 10 rushes, 127 yards, 1 TD, 1 healthy inactive
So, maybe it's okay he's where he is. It's a long season. I'm just commenting on why and how people are so enthusiastic about this guy who seemed pretty mid to me.