This is pretty much pro forma - it will act to get all the facts out in the open, and enable Ohio to put the screws to Norfolk Southern, making them fulfill their promise to pay for the cleanup.
The people I still feel for are the farmers down wind in Pennsylvania. I don't see much if any effort from PA state authorities to help them. No reports of how contaminated their lands are. Nobody's going to risk buying their hay crops, for starters. They're a small and almost invisible constituency, and probably also Trump voters, so the Democrat governor can safely ignore them. And it's looking like he will.
This is a highly respectable attorney’s take on it.