Things are obviously going to settle down, but I don't see your point with the emphasized part:Nope.
It's easy to predict what will happen with the "Cars Macron" for exemple (it's already happening btw).
First few years, competitors drive the prices down to kill each others.
Survivors are the one with the biggest wallet.
Then, prices go up, less popular lines disappear and you find yourself with a transportation network that cover only a small part of the territory, and higher prices than if it was still public transportation.
1. No such public driven bus lines existed before since the SNCF was offered some kind of monopoly since 1982 with the Loti law
2. SNCF / RFF didn't wait for the Macron law to stop investing in its secondary network
3. Thanks to points 1 & 2, train is expensive as fuck today
So, I'm not sure what you're feeling is bad with this law Macron passed.
If the private sector can do better than the public one, let them do.