What about recent American politics gives you the impression that states will act in good faith? Hell, look back even farther at the slave state collusion for Mexican territory, secession, Reconstruction fuckery, Jim crow, etc...
The only limit to states acting in bad faith has historically been the federal government. When states start fucking around too much, laws like the Voting Rights Act get drawn up to claw more power away from them.
IMO the state-federation experiment has all but failed and the majority of good faith states need a proper convention to build a modern government. Choosing now of all times to put your faith in those anti-democratic, Christo-fascist slave states is the dumbest option possible.