If the RNC can change the rules once, they can and more than likely will change them when it suits their needs.
Who in their right mind trusts those bastards we have elected? No wonder Trump is doing so well in this circus called an election.
Once the convention is underway, and somewhat before, the Convention Rules Committee takes precedence. Until then, the RNC can indeed to mount a suicide mission with unwarranted rule changes.
The important idea here is that rank-and-file GOP voters have allowed the RNC to bully them by not taking part in local GOP meetings that choose officers and platform proposals.
People who spend time and money for when the SHTF apparently won’t spend a few dozen hours a year preventing that from happening. As if a few minutes a decade in a voting booth could end in restrained government!