I think the problem with razing Spacerock is that if they did that, the order of events would likely be:
1) GK looses it's capital.
2) GK side is defeated because it has lost its capital.
3) All GK cities go Barbarian
4) Stanley is still alive, so he and anyone stacked with him go barbarian and are cool. Everyone else outside a city (except casters) croaks.
5) Stanley is in GK, stacked with every unit in the city, thus claims the city as his own.
6) Stanley is ruler of the new GK side, but it consists of only GK itself surrounded by a large number of barbarian cities, which could have been left with minimal defenses by moving units out of the cities (costing a chunk of schmuckers in garrison promotions), or with their defenses intact based on desires (If living units, they can be killed easily by a new strike force and decrypted, if decrypted, maybe make them move out so they are destroyed, or maybe something special would happen based on their link to the arkentool.)
7) GK is in a very precarious position for a few turns as it has to reconquer all its cities.
Of course, steps 2/3 might not actually come before the check that Stanley is alive and in a city, and thus it might indeed revert back to GK as the capital with no real consequences. Seems like a bit of a cheat, but that's what Parson is all about here really.
Overall, it seems like a chancy plan, and not exactly the sort of master stroke Parson has become known for.
The 'bait Charlie' thing has problems as well. Charlie knows Parson can skip out to the MK to prevent his capture/croaking, so he isn't really bait. Charlie might be willing to do a fight to try and end GK's side, but that would really just result in the above plan being initiated, minus the chance to move forces out of cities, meaning Charlie won't be able to snipe them easily. All in all, not much for Charlie to gain, and alot for him to lose. He may not know what Parson is doing, but he'll no doubt learn about the pyramid in 5 seconds or so, and know that Parson is up to something, and he isn't likely to underestimate Parson like that.
A defensive bunker in MK seems reasonable, but with the phrase "stack them like cordwood" , it doesn't sound like he is planning on decrypting them immediately. Seems more likely to be storage, which could still serve as a deterrent of sorts, a bargaining chip. "Look, I could decrypt a few hundred troops in MK, but I'm not going to, cause I'm not trying to piss everyone off, I'm just trying to show I mean business and can't just be pushed around."
Using it as a base for capital strikes sounds kinda promising, but that's really only going to work... like once. After that everyone will be sure to post serious defenses at their portals. Still, it could be used to take out Jetstone and/or FAQ, which would be very helpful, but it would come at a huge cost in regards to MK sentiment. Granted, he is fairly well set up to deal with poor MK sentiment, but having a hundred casters pissed off at you is a bad move, so the gain has to be massive.
So, all in all, defensive bunker seems most likely, but it still lacks that Parson flair. Hopefully we'll see soon.