The issue with JT is that another year probably isn't going to help his draft stock. So he has to choose wisely if he even wants to take a shot at the NFL, or possibly pursue other opportunities.
If he graduates this year (he should be, not sure though) then it may be in his interest to stay his 5th year and attend graduate school (get that MBA or something), or even to leave and pursue another path, such as coaching. If his is set on the NFL, it's probably better for him to leave early even if it is only as a 5th round pick. He certainly has a tough choice ahead of him.
From a fan perspective, even as great as he is, I honestly don't want him to stay. I'd like to see the young guys get their shot. We are recruiting too many top prospects at the position and we don't want to waste their talents. Stephen Collier is already kind of a casualty of that. Joe Burrow is the heir-apparent and that could cause Haskins to not get his shot as well, especially if Barrett returns next year. The problem is further compounded with each new class we bring in.