Island and KK exp having RSA is good in the sense that it eliminates 1 rake and may free PF at NCJ. If I am right, Island was taken to NCJ. The first daily train from South is CAPE which reaches MS at 6:45. Families withsmall kids who reach Chennai by that train cannot go to school on that day itself. KK exp can take the slot of Silambu/NCJ weekly (and vice versa) so that it reaches MS by 5:45. But now itself the turn around time is very less.So my suggestion is SWAP SBC-KCVL and SBC-CAPE Island exp timings and SWAP CAPE-MS and Silambu/NCJ-MS timing