Dear Arun Singhji,
It seems you've written exactly what I wanted to write. Agree with Sparshji (Surat BDTS Intercity Don of WR) about what reply you can expect from them.
Am attaching the reply they gave to a similar proposal I'd sent them a couple of months ago.
I've written a reply to them on similar lines to your post here, citing that...
more... the need of the hour is an intercity train, and all these long distance trains are of no use. I wrote back giving them an alternate where the train can be berthed at Pune, leave Pune in the morning and reach back by night, to solve the problem of lack of Rake Maintainance facility at Surat. This would also need just one rake.
But I'm not very sure if they'll consider it. Lets see what happens.