The Austrian Empire is like an ailing old man, given to gluttonous binging that could lead to his demise at any moment. Franz made concessions to the French based on this consideration.
With the principle of "hitting the rabbit while gathering grass," should the French government turn uncompromising, Austria could still tear off a chunk of flesh from the Kingdom of Sardinia.
How much is not important, what matters is the political demonstration to the outer world that the Austrian Empire remains a great power, possessing immense strength to deter the restless Prussians.
As for whether the French would grow too powerful as a result, Franz was incredibly laid-back. What's it to him?
The French expanding their influence is a concern for the British and the Russians. Wouldn't it be foolish for the French to attack Austria?
Don't be ridiculous. After Napoleon's reign, Europe's vigilance against France is at level S.
