So, what will be the AI improvements in DA?

I can only relate my personal experiences playing DA. The AI makes much better use of planetary tile improvements. No more farms on +300% tiles. I have seen it use morale tiles for other purposes, but even I do this unless I really need them. It chooses more of a mix of improvements on each planet. I haven't seen a whole series of planets covered in factories or tech the way I used to. In regard to this point, however, it still doesn't use it's capitols very well. It will place them on one of the 'generic build' planets, and pretty much leave it at that. It makes no effort to rebuild with the focus on the type of capitol it has chosen for that planet, nor does it yet seem to be able to 'think' ahead, and customize the build of the planet in advance to fully utilize them the way a human player would. It redesigns ships more often, and more logically. It seems to be better at taking into account perceived threats, and researching and equipping the ships it produces. I have to keep a much closer eye on my potential rivals now. It reacts swiftly to espionage attacks. I dropped 5 agents on all the acquired econ capitols of a rival civ, and within 2 turns, they were all nullified. This means that agents had been stockpiled and held in reserve. Was this a strategy to counter potential attacks? I don't know. But if so, very clever. It pays closer attention to influence. I can no longer count on one of the lower PQ planets that I have passed by in my system to automatically 'flip'. If I turn my back for any length of time, sure enough, there is an influence starbase there to stop this from happening. There are, of course, other examples, but this post is beginning to turn into a novella, so I will end and leave it to the other good citizens of the forum to continue. Suffice it to say- the AI in DA has leapt forward from what it is in DL, and with every build, continues to improve.

what ^ said it true, however i also play DA and i did say 90% all factory planets, more than once.
and he could boost a hell of allot ships from there, its one of those priority targets.

The Iconians seemed to love speciallizing worlds... New Iconia was all research (no manufacturing or entertainment, though, which wasn't too bright), while the planet beside it was all manufacturing.

Anyways, yeah. The AI is a huge improvement, and playing against 3 eastablish gifted AIs is about all I can manage. It requires very careful use of my few fleets and my first strike ability to keep fighting, because any slip up will result in my fleets being trashed because they didn't have the first shot.

i did say 90% all factory planets, more than once

New Iconia was all research (no manufacturing or entertainment, though, which wasn't too bright), while the planet beside it was all manufacturing.

The game I am presently playing has a number of specialized worlds in it. This is a perfectly reasonable strategy- one I use myself. What I don't see any longer is so many of this type at one time. In the last game of DL I played, I conquered 6 factory planets in a row. (out of the 10 the civ owned) You might think that these gave them an incredible manufacturing ability, but they cost so much to maintain, that the civ couldn't afford to build the ships it needed to defend itself, and so quickly went the way of the dodo.

Even a focused world needs some extra facilities. A research world needs it's factories so that it can upgrade reasonably fast, for instance, and farms + entertainment centers are important to any economic strategy, allowing you larger tax bases and higher tax rates.