It's a salient question whether it should stand if the key proponent not only resigned so soon afterwards due to a lack of support but also for having dismissed the power sharing agreement at the time which would have garnered support for it.

Such stipulations would probably need to be rigorously maintained as the history of impeachments in the USA shows just how often some groups try to remove others from power. If there is further incentive to do so in the form of repealing legislation then all hell would likely break loose every time something controversial was passed, and a lot more blackmail would likely be going on.