In many respects, Ops Specs are a positive thing for the operator, as they are approved when the AOC is issued. They form a hard and fast set of rules for the operation that CASA cannot vary on a whim or "interpret" to suit CASA. Any amendment or variation necessarily requires the input of the operator.
I'd rather have Ops Specs than be subject to a "Manual of Standards" that CASA can vary at any time without consultation.