Probably not. There are many cases where passenger trains are run with diesel locos even if the route is electrified, to avoid maintaining a dedicated loco for the passenger train and maintaining Loco sharing arrangement with other trains. Kollam to Punalur section is not yet electrified. So it is possible that this passenger might get diesel loco from NCJ or even from MDU itself, instead of arranging a separate locomotive at Kollam.
In MDU one more platform needs to increase. Otherwise this train departure time is too late. But arrival of TVC, this train is better. It will arrive at 6.45 am at TVC. I used to travel in this train everytime.
First Class coach is withdrawn w.e.f 31.08.2014. It will be replaced by a Sleeper coach. You will be provided alternate accommodation in SL class the difference of fare can be obtained by filing TDR along with the acknowledgement from TTE.