You mean, by changing the government so that only dukes can vote, then stepping down, then waiting for anarchy, then getting elected again, then reforming the government, and then changing the government again?
Sure, I guess he could. But it'd be messy and would make no RP sense.
Hireshmont rejects the government and refuses to participate. He abdicates the titles and refuses to have anything more to do with the republic. What's so nonsensical about that?
Messy? Hell yes. Of course it will be messy. You don't change the entire fundamental structure of the government of a realm without getting a little dirt under your fingernails.
To put a GM message about an NPC revolt sending the realm into anarchy would reach the goals he desires, without being a free pass, and while avoiding extremely gamey RP.
Mrh? Random NPC revolt throwing the realm into anarchy? Yeah, because we do that sort of thing all the time.
Look, Tim has already weighed in about how there will be no dev intervention, and clarified the dev's position that intentional anarchy to change government styles is not an abuse of game mechanics. If a player wants to change government styles using that method, then the onus is on the player to find RP that fits with the game mechanics. It is not the responsibility of the dev team to bend game mechanics to fit the RP created by the player.
At some indeterminate time in the future, there may be some game mechanic to allow players to more easily change their government style. It will not be a simple click-here-to-change button, and will incur some as-yet-unknown penalties. However, that system does not yet exist. Therefore, players will need to use the existing system for the foreseeable future.
Given that not a single member of the dev team feels that there is any extenuating circumstance that would justify interference and manual intervention in the game at this time, the chances of getting the manual change enacted hovers somewhere between zero and none. You can continue the discussion if you want, but I really don't see the point in it.