Just highlights what an insufferable pompous asshat Kasich is. Shift the burden of proof to the prosecutor? OMG the horror!
Actually, no, it doesn’t.
Ohio is, of course, free within reason to change the rules for itself, but traditionally, self-defense has been an affirmative defense that the defendant must prove, often by a preponderance. One of the rationales for this was that typically, it was the defendant in a criminal case who possessed the evidence necessary to prove self-defense, so it was reasonable to put the burden of proof on the defendant.
Shifting the burden of proof, particularly when coupled with the right against self-incrimination, could create a lot of mischief because now, all defendants are effectively presumed to have acted in self-defense, and the prosecution will be unable to compel the testimony of the one individual who possesses evidence bearing on that issue: the defendant him or her self.
We’ll just have to see how this plays out in court in real cases.