Kelly’s not doing much at the WH these days. I saw reports he spends quite a bit of time at the gym, sometimes twice a day.
President Trump could be thinking of eliminating the position entirely, other presidents have. It’s not a big deal to replace Kelly or eliminate the position. I don’t think a chief of staff thing suits Trump’s style of management anyway. Either way, I suspect Kelly will be moving on soon.
Tillerson’s was a cabinet position, different role and requirements.