harbaugh is a good coach but he has a shelf life he wears on players, I think he'd be a terrible fit for Kyler and D Hop. I think he could help make Kyler a better QB, but I don't think the personality would work. Hell Jeff Tedford as a QB coach would help Kyler too but again not a good fit, and he's retired for health reasons anyways.
Kyler needs someone to help him with footwork, help him with reading defenses, it doesn't have to be a young guy but it has to be someone who has the right temperment. Frankly I think Kliff has the right personality, I'm just not sure he's the right guy to teach him but to be fair Covid took away much of that in the offseason.
We are starting to see Kyler revert back to running backwards again which wasn't happening early in the year, someone has to get him to focus on NOT doing that it led to the fumble.