Roach explains why he is changing Khans jumping around style.

Maybe there's not enough time for Khan to learn the new things.

You look at Mayweather and he's got Roger and even his dad training him solely for the 6-8 weeks of camp. Same for Wlad and Steward, Ward and Hunter etc.

Then you have Roach with Pac, Chavez and Khan, who's fights are usually within weeks of each other; Khan Peterson (planned for) 19th May, Pac Bradley 9th June, *Chavez Lee 16th June, Khan Garcia 14th July. None of them are getting the undivided attention they deserve as top level fighters.