Is Thomas ever expected to regain his former athleticism?
It seems odd if the answer is no, because I had a friend that slipped on a wet spot on the court and tore his ACL, MCL, PCL, and broke his leg. He seems to be just as athletic today as he was before the injury. He played college volleyball, so he had some hops, and if anything, age is the reason for any diminishment since college, not any lingering effects from the tears.
I know each injury is different, but my friend's was pretty gruesome, too. He used the '49ers' doctor, but I assume Thomas didn't see a quack. I also can't imagine that my friend rehabbed any harder than a D1 athlete, especially since he smokes a lot of weed and can drink with the best of them.