I don't see why the mechanics of the homeworld and the stuff on it should work drastically differently. (OK, maybe units only found on homeworlds, but other than that, why mess with established mechanics for only two planets?) Human homeworlds are nothing special beyond having extra resources and having a home command station on them. Why shouldn't the AI homeworlds be any different? (again, with the exception of the tougher than normal, sometimes having "strange behaviour for guard posts" guard posts)
What I do see is a change in behavior of the AI player. If my home is under a credible attack, I go into "panic mode" and throw everything I got into taking out the threat. That is not a new mechanic, but rather a different behavior. I would be happy with a similar alteration in behavior of the AI under these circumstances.
Not saying the core guard posts shouldn't be buffed, or more variety shouldn't be added to them. Rather, I am saying I don't want the game engine to treat AI homes differently, but rather I want the AIs to react more "severely" when AI homes are under attack.
Implied in this is that I don't really want any new core guard posts introducing mechanics not seen anywhere else in the game.
Currently, every mechanic each core guard post has is seen somewhere else in the game in some , though maybe not with the combinations of mechanics that some guard posts have, or to the same magnitude.