There is no need or meaning to reduce SL and GS coaches from trains like Dhanbad Alleppy and East coast express and any long distance train having avg of around 50kmph and stoppage every 30km. Even when 130kmph TT is made for these trains avg speed will it move to 55kmph. Better to keep the rake. Composition at /4 GS and 6/7 sleeper with 10 AC coaches. They need to reduce 1AC and 2AC and add SL and GS.