The best thing for Tua and the Dolphins is he decides to return to Alabama for his senior season. This way he will have the time to fully let his hip heal while he completes the work for his college degree. If his hip heals completely he can always enter the 2021 draft and he will still be a top 5 pick in the draft next year whether or not he plays another down as long as he is medically cleared to play football again.
The Dolphins will benefit because they will not use a draft pick on Tua while he is still recovering from hip surgery and not knowing if he will fully recover so he can continue playing football again. By Tua returning to Alabama, this will prevent the Dolphins was even having to take the risk of drafting him with a first round pick and they can use that pick to fill a hole at another position on the team.
The Dolphins will benefit because they will not use a draft pick on Tua while he is still recovering from hip surgery and not knowing if he will fully recover so he can continue playing football again. By Tua returning to Alabama, this will prevent the Dolphins was even having to take the risk of drafting him with a first round pick and they can use that pick to fill a hole at another position on the team.