don't think anyone would argue against the fact that we really need improved rail services to assist with the decentralisation of population in Victoria - anyone living in Melbourne can tell you how stupidly crowded things have become in the last ten yearsThat sounds like a good reason to kill the idea.
- to promote private transport over public by removing major destinations that warrant high frequency, high capacity or reliable public transport
- to make bigger houses with fewer people in them within five minutes' drive of a commercial area
- to absolve a city of its large skills base (especially specialists), employment opportunities (especially specialised ones) and opportunities for specialised interests, cultural and entertainment pursuits
Some of the trains might be too crowded to board at Toorak (I haven't boarded a train there myself). That's not a crisis of overcrowding. That's something that could be solved by higher frequency of services. That's something that could be achieved by ignoring people who whine "I don't want Melbourne to be bigger than Auckland" and promoting housing and transport improvements that keep the best people convenient to the employers who need them.