, I don't see a need to rewrite the whole timetable.
Although I'm always warm to the idea of DMUs (which should have become apparent over the last three years), I disagree with this notion that accepting that people are only going as far as Wagga should involve wholesale timetable re-engineering.
There is a much simpler solution before us.
If you can't be bothered to read this, skip to the tl;dr
part that summarises my idea.
Before we dive in, it requires a modicum of light background reading
to deepen our situational understanding before diving into the argument. From this background reading, we can extract the key information: there are three trains a day, every day.
"So what?", I hear you ask, resentful that I've introduced to the railway enthusiast community the idea of pre-argument 'background reading'.
Bear in mind the Albury service is the only V/Line service run on standard gauge.
Look at the daily morning up and evening down Albury 'pass' trains. Obviously, the train that forms the evening down service stables overnight in Albury to form the morning up service. This gives us an opportunity.
To understand why it's an opportunity, let's go ride a branchline. There was quite a bit of noise during the NSW election in March about the need for regional trains taking people to the city in the morning and home in the evening. It was about the Central West, but I think we can safely assume that the Riverina has similar sentiments.
So how is this linked to the 'opportunity'?
All you need to do is extend the 18:02 evening Albury pass to Wagga Wagga, where it would arrive around 23:10; it would then stable until around 05:25 the following morning, getting into Albury at 06:35 and continuing onto Melbourne to arrive at 10:30, as per the current timetable.
Voila! A conveniently-timed Melbourne to Wagga Wagga service, requiring no additional trains.tl;dr
New Wagga train — MEL 1802, ABX 2200, WGA 2310 — stable overnight — WGA 0525, ABX 0635, MEL 1030 — no extra trains needed.