You're right - it was a cracker map back in the day (and more open than a lot of the other Namadgi areas), but it was getting pretty marginal the last time I ran there in ~2007 so I'm not surprised that it's a dead loss now.
Orroral Crossing took about 40 years to open up properly from the 1952 fires, so maybe we've got something to look forward to when we're in M70 (me) or M60 (you).
Just another reason to look forward to retirement...