I get why hes trying other solutions, the 4-3-1-2 will never work against good teams, the opposition will just clog the middle and that is it, modern football requires for the pitch to be stretched.
I just don?t get why he doesn?t play Semedo as part of the back three and push Roberto up as the wingback, Semedo for all of his pace can?t put a ball , atleast with Roberto you knows hes capable of that one cross.