Don't waste your money on a lawyer.
Being regulated to death by government is not a basis for a cause of action recognised in Anglo-Australian law.
Government agencies making statements about simplicity and red tape reduction and harmonisation and consultations and reform that turn out to be vacuous misrepresentations is not a basis for a cause of action recognised in Anglo-Australian law. Everyone knows they're vacuous misrepresentations, so no reasonable person would rely on them.
A government agency not having the competence and capacity to administer a regulatory system in sufficient time to enable the regulated industry to make confident and timely investment and other decisions is not a basis for a cause of action recognised in Anglo-Australian law.
As you keep getting told - for free - the only remotely possible solution to your problem is political action, not legal action. But given that the majority of participants in the aviation industry will vote for either the Coalition or Labor, notwithstanding what governments of both persuasions have let happen to the industry, you can just BO-HICA.