I think I have done everything I want to do with the Arabs and the Turks are either too luckbased (600AD) or too easy to win (1700AD) currently.
I don't really understand the Qizilbash-changes though. But without the Silk Route the Iranians aren't that interesting for me anyway...
So lets go back to my wishlist:
- Peru: thanks

- Japan: I think they could really use a third midsized city in their core since the Indonesian and Chinese cities are usually huge and multi-religious which is hard on your stability. And a cow is hardly a food resource^^
- Ethiopia&Egypt: as long as it isn't implemented I just wanted to keep it on your radar
- Orang Laut: you haven't committed to anything yet so again I wanted to keep this on your mind
- Mongol core: now that core-cities don't give an automatic huge core bonus it is probably a bit less important but I still feel that Mongolia should be very unstable if it overexpands since it usually gets lots of military stability anyway.
- techcost/pop: okay you're going a new way here that I've yet to try. However one of my main problems before was that it wasn't really linear but more of a step function where sometimes an increase in population didn't affect your cost at all and sometimes 1 more citizen added almost 10% to your research cost.
- techtrade: really? the only reason I remember for a civ not to trade techs with you at friendly is that they're currently building the associated wonder but right now they are holding back a lot more, even if several other civs have already discovered that tech.
- Indonesian UP: okay, if they're not supposed to use it, fine (since it is indeed currently not an option for them), but please give them some sort of a useful UP.
- "Super-Persia" if the Greeks falter and don't conquer them, Persia
often becomes incredibly advanced and powerful due to the Silk Route (imho), so please at least keep that somewhere in the back of your mind in case more people confirm this
- Porcelain Tower: yeah, it seems to work somewhat but since the only way its bonus is applied is via custom houses I'd suggest changing the wording of its bonus so that that becomes clearer. Maybe "all domestic trade routes profit from custom houses" or so.
- Ottoman late game: if you nerf the Spiral Minarett that might already help, currently the human player can just avoid Liberalism (and the associated decrease in shrine income) in the 1700AD-scenario since you won't need secularism or republic
- Congos core: oh come on, their core is incredibly tiny and they usually lose their capitol to Portugal, which sometimes leaves them without any core cities at all. And civs like Brazil really depend on a surviving Congo to buy slaves (since Mali and Ethiopia are both dead in 1700AD) also it shouldn't matter in a normal UHV-game but might open up some tough domination options for the players interested in that.