I wonder if the critics of GRo have thought through the reasons of why LMJ hasn't seen the field that often this season.
This is probably the number one reason LMJ is sitting behind Hunter. Not that it's his fault since he wasn't taught protection schemes in college. There are questions just based on his size if he will ever be an adequate blocker.
Jack of all Trades vs Specialists
I think the niners prefer guys who are pretty good at all the skill sets of a position versus a player who is fantastic at a few skills. To me, a lot of their offense is built on counters and setting the defense up for a big play. A lot of commenters have said, why not just throw a screen to LMJ. I'm sure GRo has thought of that as well as the opposing defense.
I'd like to put forth the argument that LMJ doesn't play more because he can't pass block and there are a limited type of plays that he can execute. He makes the Niners offensive scheme too predictable, which is bad for an offense that heavily relies on counters for big plays.