Going thru the guide:
Towards the top there's a reference of suitable for diplomatic victory; not sure I agree with that, your UI means you have much less need to ally with city states than others. (You'll get their luxuries anyway) But I see you anticipated my objection by mentioning it much further down.
If you're digging up one for the ruins as long as you create an artificat the city state will send it's own worker along to improve the tile. No need for your own worker for that however; since you probably only built one copy of your UI in that city state you need to send your worker to replace it on another tile.
You might also want to mention that if you later ally with the city state in which you've built your UI with, you'll actually get a second copy of the luxury. (One from being allies and the other from your UI). However, you wouldn't be allowed to sell it anyway. So the only city states you'd want to spend the time allying with are those with strategic resources. (Other than if Austria is in the game you wouldn't want Austria to stay allied for 5 consecutive turns)
As early as possible : Actually bad advice if taken literally; it takes the AI time to improve its stuff. Your much better off with standard NC as early as possible, but right after that then get the trade routes up and running. Taking them one at a time
Animal Husbandary: Many starts call for this pre NC, (second most common only to Mining) but not all.
Sailing : Can almost always wait until after NC. (Only time it can't is if the RNG has given you a sea luxury type as your primary luxury
Herd of workers: Appears to be over stating it because you don't need your UI in every single city state, but only in those with luxury types you don't already have covered. (Remember that you can not sell extra copies of luxuries granted by your UI) Yes, build more than your normal amount of workers though.
Great Lighthouse: Goes too fast on Immortal (AI in love with the wonder); even on Emperor it appears to carry with it the cost of delaying NC due to not being on the NC path. King is about as high as you can build NC first and still have a shot at getting this wonder.
(Can be map type specific; if most of the AIs started away from the coast you have a much better shot at this wonder than one in which all but one did)
I see a reference to no maintenance to the UI. Yes, that is true. However the workers themselves are chewing up maintenance costs, so it's fairly expensive to have a large number of workers doing nothing but building your UI in city states that don't have a unique luxury.
Commerce: The side of the tree you mentioned is ok, but I wouldn't select the other side.
Self founding cities so late that Resettlement is available: Still a really bad idea. Happiness isn't the problem. Instead it's that you've just added a city that needs yet another copy of extra single building that you haven't yet built the national wonder for yet. (Which will likely include National Vistor's Center if you are seeking cultural victory and National Intelligence Agency if you are seeking either a diplomatic or cultural victory. You're much better off conquering existing AI cities which will have much higher population, better production, and in which you can choose the timing in which annexing it would be best.
In reference to luxuries and (AI) Maria not buying them; if you play with legendary map setting, every player starts with a monopoly of one type; each if a major AI pouches one or two of them it's not a type granted to city states so she'll still buy it.
