I agree. If I were Tua's father I would advise him to not play again this year, invest his money and consider retirement. The chances of CTE are elevated for him as it is for all athletes that take head shots. They have found that even girls bouncing soccer balls off their heads have increased levels of brain damage.
I remember the "old days" when we would simply say he got his "bell rung" but medicine has come much farther and Tua may have already gotten his life shortened or, at best, will face early onset dementia.