Butler said it was to take the work load off the other two when it comes to mini games e.t.c. Campbell will be doing most of the other stuff that’s non first team but Fitz would also have to chip in which increases his chances of picking up an injury. Sounds like Butler wants to save him primarily for 1st team duties and have young Johnson to come in and work alongside Campbell to do the other stuff.
I suspect this may have something to do with Fitz only having a year left on his contract and if we don’t go up this season he may end up moving on.