I've been playing Morgan so IDK about how the AI does him yet, but I do remember the AI being quite lousy with him. It's funny that he'd have "don't spread quickly" checked when he's one of the most natural fits for "spam cities like mad" guys. You must have really improved him if you removed it
Gotta try a game with someone else and see how Morgan does.
University seems to not be doing that well. It think it might be because the warmongering guys are just too aggro with bullying for tech, so having a tech advantage doesn't mean anything. It mostly just means more free tech for the guys with actual bonuses or being stuck in war with them if you refuse, which drags you to their level.
Lal seemed to be doing really good. He first beat up the Spartans, then managed to kick my ass in a counteroffensive while holding off Yang. He seemed to adapt to my air power, too, and choppers didn't seem to just hand me the game at all. You seem to have improved this aspect of the game
I don't remember the AI having trouble with naval bases, they used to spam them even back in the day. What was encouraging naval bases supposed to achieve?
As for Santiago... eh, if the industry bonus is making Yang naturally as strong as all the others combined, then it makes sense that Santiago would be the weakest. The obvious problem is that there isn't a very good mechanism for taxing other people's industry, so if Santiago bullies you she ends up with stuff she doesn't necessarily need. Like bullying people for tech and this ends up with with her having tech that she can't effectively implement / is useless to her OR bullying people for tech which starts wars which she can't necessarily win, because the other guy can just outproduce her.
Or it's the other way around - she's too unlikely to go to war because of ideology, when she should be going to war. In the last game Me (Morgan) and her were neighbours, and Santiago let me encroarch on her teritorry by pushing the frontier with infinite city spam. She had probes and rovers and she could take me on without problems. But since I was a Police State and gave away my tech, she just never attacked me. She could and should have just rolled me, but instead she got into a war with Miriam and Lal and they kicked her ass. I bet the Miriam war was because someone wouldn't give tech away which is kind of silly because Santiago just shouldn't be looking to pick a fight with a unit spammer like Miriam, and the other was an ideology war but not very smart. And the deeper problem here is that it's perfectly possible that Santiago and Miriam went to war first and then Lal was easy to talk into joining the conflict because of his ideology differences with Santiago. And it was all stupid, she should have been going after Morgan all along.
Anyway, Gaia has the same problem. In every game which I started Gaians were quickly eradicated, generally by the Hive. With Yang as overpowered as he seems to be (compared to the others), being set to antagonize him (or be antagonized by him) seems to lead to disaster. This might also be why the University seems to be doing poorly, and might also be part of why Yang does so well - he's likely to get into fights with people he can beat up. Santiago gets into fights with people she can't beat up :D
Just my thoughts.