AI Tamar does fairly well in my games. I'm not sure why since they build so many holy sites.
I sometimes give different scores for different victory types. I would give an F for Kongo for religious victory.
. I'll cover some thoughts on the new civs.
Hungary: I still give them an A for Domination. I just haven't had great luck with city states in my Hungary games. Sometimes the city states you are good with are so far from the front like my last Hungary game, which also had mazes of mountains and heavy terrain. I played a relatively peaceful Hungary game that time. I give them an B for both Science and cultural victory. They can get districts up fast which helps. Religious victory I'll give them a B as well since they can get holy sites up fast if they so choose. And DV I give a B as well only for their ability to maintain city states, but it's still a tough slog no matter what.
Maori I give an S on cultural victory. Ridiculous really. Probably a C on science victory, B on domination victory. B on religious victory and C on DV.
Ottomans I give an S on domination. If you use them correctly you shouldn't be stopped. I give them a C on everything else, almost a blank vanilla civ.
Sweden I give an S on cultural victory. A on diplomatic victory, I don't think I'll give anyone an S on DV, it's so hard to get. B on science victory only because she can often get more great scientists. C on religious victory.
Mali I give an A on cultural victory. Yes I have discovered you can essentially buy a cultural victory. I give only a B on science victory since it's often hard to get campus districts out early. I rely on free inquiry for my science early on until I have enough district limit to build campus districts. religious victory is a S I suppose, though I haven't actually tried it with them, so I'm not sure, and it depends on if you have enough desert. DV is C, you can only buy so much favor.
Eleanor is almost a vanilla civ in my opinion, but she does get an A in cultural only because you are going to be accumulating so many great works. I almost win a cultural victory before I can flip my first city. It's so hard to flip cities.
Canada is an A in cultural victory. Everyone bad mouthing Canada does need to learn to use national parks. Getting 10 national parks up easy is awesome. Plan ahead. Teddy may get more out of them, but Wilfred can get more of them up, then save faith for rock bands and conquer the world with awesome Rush songs. They are a C in everything else, a blank vanilla civ really. Except DV I'll give them a B, not as high as Kristina because I think Kristina can get more favor.
Incas are a strange civ in that they are good at food and production, but not much else. I found myself struggling for money in my Inca game, and couldn't build many of their unique units due to lack of money. Not to mention getting pounded and one shotted by knights and crossbowman. I needed knights of my own, but just wasn't possible with my money and tech situation. They have limitations, and I don't feel are as overpowered as everyone is saying they are. B on domination mainly because they can get powerful and large cities. C on diplo victory and religious victory and cultural victory. I just struggle to get a lot out of this civ, but I do love the big and productive cities.
Dido. I really want to play a 2nd game with her. But she's pretty much average on all accounts. I'll give her a C on everything. Though on a water map she can be a B on domination. I won't give her higher than that, because anyone can dominate on a water map. My fastest domination victory is Japan on a water map.