For those more interested in the football aspects (rather than the drama), here's my observation of Fishback (based on very limited information):
Played QB only at the end of High School, for a very small school outside of Chico, CA (i.e. no-where-ville).
Showed in some camp setups that he can wing the ball - approximately on par with one of the West's most celebrated QB, Cal's Zach Kline.
There's not much footage available except for camp footage in shorts and t-shirt. He compares pretty favorably to Zach Kline in terms of size and arm.
Shows good mechanics and a live arm, with solid release, and good feet (but it's just camp drills remember).
Zach Kline is not a big QB, so I'd guess that Fishback is about 6'1" in reality. HCMM puts less weight on height than Embree did.
I think the biggest question mark on this kid is overall polish and decision making, which can only come with experience. He's not played a ton of QB.
Without seeing game film (and not "highlight film"), it's impossible to know his accuracy, ability to put "touch" on passes, read defenses, react to pressure, etc.
I wouldn't put any weight at all on how this kid's recruitment went. He is from a town of 3500 people, in the sticks, and only moved to QB late in high school. He would not come into the program with the polish of a true freshman that USC may recruit from Mater Dei, who's been working under the tutelage of a private QB coach since the age of 7.
If HCMM thinks the kid can play, compete for some playing time, that makes everyone better.