What the NHL really should have is a penalty challenge for the case of ridiculous calls with the same or similar rules applying to it as a goal challenge. Say you lose your penalty challenge, you then lose your goal challenge, timeout, & you get a minor penalty or even better a double minor (4min).
Make it really risky for teams so that it's mostly only used for obvious dogshit calls that can often ruin a game. Refs will find a way around this by still making makeup calls on the borderline/grey-area penalties but at least they won't be calling the ridiculous stuff; or just for the cases where the ref happens to make a really bad call.
And in these challenges it must be clear to Toronto that the penalty should not have been made; anything slightly borderline remains.
It however, should be limited to challenging penalties & not missed calls I think, at least until they can better manage it I think it would be better than nothing.