I play a lot of LAN AI crushers with my brother. The AI is actually pretty competent. But it has a few distinct holes. Other than the obvious issue with the AI and starbases, as well as its completely arbitrary choices of capital ships, it seems like the main issue is with siege frigates. Since I play with the AI so much, I can't help mentioning the issues with siege frigates and the AI. Maybe, just maybe, the devs will read this and spend even 15 minutes improving this for us poor SP people.
The AI LOVES siege frigates. It tends to get 5 siege frigates before practically any other ship in its fleet. Try going versus 3-4 AI's, and that's maybe 20 siege frigates. And this poses a serious problem.
That's because in the current patch, siege frigates are worthless. All humans know that. But that's not the least. Siege frigates use up 14 pop apiece. They also cost more than a carrier or a heavy cruiser. And yet, with all those costs, they are significantly weaker than a light frigate. And they have a pathetic attack against anything that's not a planet. And to top that off, they give you 65 XP for every one killed. Talk about an advantage early on for your caps. But even then, one could argue they still have some use. But with the way the AI uses them, no way.
Despite siege frigates being both so weak and so expensive, the AI will often send their 5 at you from their planet, the instant your fleet leaves your planet on its way to theirs. This happens almost without fail. Alternatively, the AI will send their 5 siege frigates to one planet, and their fleet to another. But unless I'm a total idiot, those siege frigates are gonna bite the dust.
A third and final issue is the player experience (i.e. irritation and annoyance). One knows the AI has finally "got somewhere" when the first siege frigate is sighted. And one groans. Why? Because not only are siege frigates pathetic, they are annoying. Why? Because you have to send a little bit of your fleet to kill their pathetic siege frigates, or they will eventually kill your planet. Additionally, let's say you're defending your system against an invading AI. Suddenly, the AI's 5 siege frigates pop in (they were most likely busy elsewhere). And then, your entire well-micro-ed fleet suddenly sets off after the siege frigates, ignoring the huge fleet they were just engaged with. I don't WANT to engage them! Why do my ships insist on it? And to add to the annoyance, let's say you've surrounded your planet with defense platforms, and the AI's typical 5 siege frigates pop in. The AI's 5 siege frigates, all alone and without escort, will skirt your planet, until they find that one hole that is not covered by a platform. They will park their frigates one centimeter out of range, and proceed to bombard your planet. They will always find that hole if it exists, and park perfectly in it, forcing you to send your own 5 LRM frigates over to deal with them, or else lose your expensive planet. What's even worse is when 2 AI's each send in their 5 siege frigates. Then you have to send over a large portion of your fleet to kill them, or they will kill your planet first.
That's it for my rant about the AI and siege frigates. But I can't help thinking that instead of every siege frigate built, the AI could have had 2 LRM frigates, including both resources and pop.