I smell a hint of 'cause that is easy'.
Well, it's at least easier
Though sometimes it's painful if the AI also has _you_ chokepointed. Controlling the center world of an X map somewhat helps because the AI will somewhat split between all 3 "fronts", though that makes normal defense harder on you somewhat if you're trying to guard all 3 of the wormholes. In an FS game I tend to plant my city smack on top of the wormhole that leads deeper into my territory, and so it makes it easier to defend the single point.
Just flew my ships in and killed three worlds in a row and planted comm stations on all of them. The sort of thing that you would never ever do in a normal game.
Yep
In one of my games I just glassed the entire outer ring of the concentric map, largely for fun (the knowledge was necessary too, though).
I'm almost tempted to try smashing every world just to see if it's possible with this overpowered setup I currently have.
Yep, particularly once you have the BBs and DN (or even DNs if you make more cities), it gets to the point where it doesn't matter that the AI knows you're coming, it can't stop you
That is often a design downfall in RTS games and we wouldn't want that to be normal, but it's ok for FS games to sometimes end that way.
Which is one of the "relief valves" built in against the FS campaign being "grindy": if you feel that way, just take your whole spire fleet (plus whatever else you like, munitions boosting stuff is good, or some transports with colony ships, engies, etc to setup repair bases, etc), and try to kill the AI. No subtlety, just lots and lots of beam weapons
But folks tend to feel like they need to finish the "storyline", so that option may not seem apparent. And there's also just the same-ness feeling of the recovery missions, which hopefully we'll be able to do something about fairly soon.