That's where the uniqueness on the individual planets comes in. At any rate, the proposition of splitting the AI types further than they currently are is such a vast thing that it's not feasible until early next year when we do the next expansion, regardless. And even then I'm not sure it's a good use of time.
I'm all for more variety -- don't get me wrong. But overall AI personalities are but one way among a whole hat full of ways to accomplish this sort of goal, and latching on to that one very difficult method is not something I care to entertain. If the minor factions aren't interesting enough, suggest new ones -- we have an actual mechanism built around those, and I'd love to see the number and variety of those grow. And they are additive, as players want. And the other focus is on making individual planets more unique through increased variety of AI ships, etc, as I noted.
If you're playing base game only and feel like there isn't enough variety after you play it for a good while, though... that's pretty much what we created the expansion for. Not that I'm just trying to hock an addon to the game or whatever, but if there isn't enough content in the base game to keep you happy after a few dozen hours of playing the game, then that's precisely why the addon was created (and we charge for it because of the sheer amount of work that had to go into it, etc).
The game will grow, through DLC and expansions. More minor factions will be added through both venues, as will other units, mechanics, and so on to make the planets more varied and interesting. The AI personalities are but one layer amongst many in the tapestry of a galactic scenario, and more personalities will be added as well, though the likelihood of having more than 2 at a time is about nil; it's simply not needed when all the other already-working mechanics for expansion and variety are considered. We do a ton of stuff for free, and that's always coming out as DLC in a pretty crazy stream, but by the same token if you want some huge leaps forward, those are the expansions, which are in another class by themselves even above our massive free content add-ons.
I don't have any disagreements with the sentiments being expressed here: my disagreement is solely with the suggested remedy to this (and the ignoring of the expansion, which was largely built to address wanting more variety in the first place).