In an agreement, ideally you would just remove the ability of corporations to directly invoke their own protections. You could take out the investor state dispute process, as Australia has done—and other countries, such as Ecuador.
I'm not an expert on this, but there would be, for example, somebody like Gus Van Harten or David Schneiderman and others from York University who might have a better idea of the kinds of reforms you could propose.
The first was to exhaust local legal remedies. You could also have a set roster of arbitrators so that you'd know who you were going to get looking at your case; you could have a right of appeal; you could have more transparency and ability for third parties to make depositions and affect the results of the case.
So there are things you can do to make it less corporate-friendly, to basically balance out the process.