I believe the majority of Amida's deficiencies stem from his lack of physical strength. His rim protection is elite, but he consistently is outmuscled on the low block, both on offense and defense. That, combined with him trying to block every shot, even those he has no chance at, have led to his putrid rebounding numbers for a 7 footer.
It's easy to use last offseason as an excuse, but it may be a legitimate one. That is the time of year where most players work on their bodies, and Brimah is in desperate need of weight. If he can put on 10-15 pounds this offseason, I believe that will tremendously improve some of his weaknesses.
There's still a lot to like with Brimah. He's 7 feet tall, mobile for his size, ranked first in the country in block% and fourth in true shooting%. Considering that he's only been playing basketball for a handful of years, that's impressive. He certainly has his weaknesses, but he's got discernible skills to build around. He just needs to put in the work on his body to be able to bang in the low post.