Then you don't understand Omtatah.
He is about the Rule of Law. He doesn't see how one can fight corruption by corrupt means. If you are going to fight corruption then avoid collective punishment (of Procurement officers); Specialized treatment by singling out some people on no foundation and above all constitutional presumption of innocence. Uhuru and Ruto benefitted from that when most people in the world were sure they were war criminals.
Omtatah has listed the legal stumbling blocks he feels Uhuru tried to fly over. There is the question of Kinyua firing civil servants via a circular. This matter was years ago subject to long litigation between Moi and some policeman (Muriithi). The 2010 Constitution sought to address it by making it clear that civil servants did not work for the person of President or stayed in office at his pleasure. The Public Service Commission was set up and given a mandate.
There is the due process again established by the constitution. Whichever way you look at it, Uhuru is trying to play games while at the same time pretending to have power he clearly lacks.