Why are you writing about hindsight?
Tua had two concussions early this season (Buffalo and Cincinnati) and during the Green Bay game the back of his helmet struck the ground hard, at which point a member of the Dolphins staff should have sidelined him.
Really he should have stopped playing after the September 29th Cincinnati game , but he and, or the team kept taking a risk and that resulted in his third concussion of the season, December 25th against Green Bay.
As I remember, when he went down, he landed on his tailbone and then his back and then his head hit the ground without bouncing. This may have been the Greenbay game or one of the other games, where his going down was widely replayed and commented on. When he got up, he was stumbling in a manor more closely related to having a pinched nerve in his spinal column. A condition I lived through on two different occations.
The point is, I believe for good reason you are presumming how hard his head hit the ground. Then you further presume what the correct medical approac should have been. In the fall I'm thinking of, he should have been taken in for CAT scan to look for a cause of what pinched his spinal cord.
I would point out that the great running back Earl Campbell had a genetic narrowing of the spine which eventually pinched his spinal cord to the point he had to give up football.
Don't let your presumptions blind you to the other problems that may be affecting Tua. If you think I'm talking about some far out and distant probabilities, consider this - what severe damage did Tua go through before we drafted him? His pelvis was broken. Where are the lower extremity nerve breakouts that emanate from the spinal cord occur? They break out at the pelvis.
Where was my back problem that caused me to be physically misaligned laterally 4", due to an automatic body process called guarding, located at? It was at my pelvis at L-4. A CAT scan showed my spinal cord was also "displaced for a vertical length of 4". When the surgeons opened me up, they found my disk had ruptured so far into the spinal canal that it had broken off, severely bruising my spinal cord. I'm lucky it hadn't severed my spinal cord.
My back problem was not the result of an accident. I was born with congenitally week feet. There were normal looking arches in my feet until I stood up. Then they went flat due to low muscle power. My foot doctor was treating me for bursitis of the heel when I was thirteen. He told me that do to my weak feet, I put a strain on my back when I stood and walked and that I would probably need back surgery when I was 35. He was off by just two years.
When I went to join the Military, I was classified as a 4-Y, just one step up from a 4-F. the reason the Marine Corps accepted me was due to two things. It was 1965 and they were desperate for personnel, and I had qualified in their intelligence tests for electronics training as a technician, an area that they were even more desperate in for personnel.
I may be prejudiced, but I think I have a "deeper" knowledge of the effects of nerve trauma effecting the lower extremities than any poster here. What I saw from Tua when he got up and had, after a step or two, trouble with his legs, I had a very good idea what his problem was based on personnel experience.