Yes, the Kilmore-Lancefield line was something of a white elephant.
In relation to the land acreage for not only Springfield, but all the stations on that line, I quote from an article about an exploration of the line in August 1968 by Michael D.G. Howes in the September 1969 edition of Australian Railway Enthusiast
"At some [station sites] one can see how large the stations were because the original fences are still in position. The stations were as big as small farms - Springfield, for instance, occupied 32 acres. It's anyone's guess why such large amounts of lands were taken."
incidentally, according to Mr. Howes there was nothing at any of the station sites in 1968 except long, grassy mounds. Apparently all five stations were manned for the first year or so of operation. A source elsewhere tells me that a few years after the line opened, the station buildings at Springfield were removed to Boigbeat. They don't appear to have been there at the end of that station's life.
Gman_86, the road is yours.