I would be willing to bring back IT. Pairing him and Smart would be perfect, plus it could also give Kyrie the needed rest to endure the 82 game season.
In all seriousness (I was joking in the OP to divert attention away from Lebron threads), but if Rozier is gonzo, then IT would be kinda fun in that role. The money and his acceptance of that role might be some hefty obstacles though.
At this point, I don't think IT can complain about his role, nor money. His injuries and his fierce and feisty leadership has deterred from suitors away. He would either play for a terrible lottery team for a better contract with extra cash flow, or go back to the Lakers, where his role would still be in a terrible position. Playing for Stevens would either give him the time to adjust and recover 100%, utilize his strengths and score efficiently in a role in a team where he can play for Sixth Man of the Year award, and boost his resume to earn a better contract next year. He would also be surrounded by close fellow teammates, and benefit from playing alongside Hayward and Horford. Plus he loves the city of Boston. It would truly be a Cinderella story if he came back, won Sixth man of the year, and won the championship.
Although, I think it could also backfire on him, as people will still assume he's doing well in a familiar system/environment. Question marks would still arise if he can ever continue to put up great numbers outside of Steven's offense.
If IT could accept a role as a 6th man off the bench? Absolutely.
(It ain't happening, though)
He came off the bench for the Lakers, and will continue to do so if he re-signs there as Magic has stated Ball is the future PG.
I could see him heading to the Magic.