Seeing as the hotfix just came out the other day, we may need some more time to see who rises to the top, AI-wise. I played last night, and did not see anything unusual in terms of the pecking order— Chandragupta, Poundmaker, Lautaro, and, to some extent, Tamar, were leaps and bounds ahead of the other AI counterparts. They were all focusing on their strengths (read: Chandra was warmongering, Poundmaker was a production titan, Tamar was going hard with missionaries, etc.). Of course, they were like this pre-patch too, so it is hard to determine if after one game the patch+hotfix has changed anything.
In general, the above, and especially Amanitore and Jadwiga, are generally solid AI Civs. Consistently middling civs that I see include China, Japan, England, and America. Germany can be hit or miss, depending on Fred’s start. Sweden and the Otttomans always get beaten up by the time I meet them and their one or two remaining cities.