I'm up for the idea, it would not only be for convenience, but it would help the environment in the long run, and the investment would pay off over the long haul. Think of all the diesel fuel the LIRR will save, the amount of noise pollution reduced, and the departure and arrival times being quicker. Of course $18 Million a Mile was a figure in 1987, and of course today it would cost at least $27 Million a Mile since they would have to convert all 6.8-miles of track from wood to concrete ties or essentially replacing the track. Of course there is signals, upgrades, possible station, substations, and inflation.
It's about time though that the branch should be electrified, and the only station I can think of is something similar to Pinelawn near the Wellwood Avenue or the New Highway crossings.
As for the Port Jefferson Branch, if it is approved, I would do it in phases instead of all at once.
Phase 1: Huntington to Northport (includes adding a second track and platform for Northport).
Phase 2: Northport to Smithtown.
Phase 3: Smithtown to Port Jefferson.
This is the train to (NYC). Stopping at: Babylon, Lindenhurst, Copiague, Amityville, Massapequa Park, Massapequa, Seaford, Wantagh, Bellmore, Merrick, Freeport, Baldwin, Rockville Centre, Lynbrook, Valley Stream, Jamaica, Kew Gardens, Forest Hills, Woodside, Penn Station OR Grand Central.