what i think that we cannot fear what happened last time and not take that decisions. we must back ourselves the next day.
like rubel bowled bad in death overs in the SL match, and shafiul bowled in the last match. so do they stop bowling in death overs ???? no. we should back them that , it was a bad day and next day they will perform.
same as powerplay, depending on game situation we should take it whenever we feel is the right time. we cannot hesitate thinking that happened last day. we should remember every day is a new game and new situation