Freedom of/room for manoeuvre
Definition 1 of 2
Pro Tip 1/3Decision-making Power
Used to emphasize someone's ability to decide without constraints. 
With the director absent, I had the freedom of manoeuvre to sign off on the project.
Pro Tip 2/3Limited Control
Implies that someone or something else has relinquished control. 
The relaxed rules gave the team more freedom of manoeuvre.
Pro Tip 3/3Comparative Advantage
Indicates an improvement in autonomy compared to a previous state. 
He negotiated for more freedom of manoeuvre than in his last position.