I don't want to go too deep into this as I'm planning an another playthrough to see what I have missed in the first one. Information, mechanics...etc.

BUGS:

I've only encountered 2 major ones. One I've seen posted by others already. it's when your units "go invisible" somehow. Mine also got attacked whilst invisible so it made the battle screen and the enemy units invisible too somehow. I ended up with a battle deployment kind of map with the 2 different colors of nations over my standard map with no units or options to start or retreat until I reloaded.

The other bug was when I got attacked by my neighbour, he won hes siege, occupied and took the territory -where I queued up Temple of Halicarnassus to be built- in the forced peace. (I lost that war, more on that later) He attached that territory to his capitol. In the next war I took that back but the option to build the wonder has dissappeared. It was not built by me or him or anybody else and when I looked at the available wonders screen (which is not very easy/intuitive to find btw) I had no option to rectaim it or claim any other wonder, since according to the game I was still building a wonder. So because my territory was taken the game "lost track" of the current status of the wonder and since it was claimed but not ever built (as it never showed up again to build anywhere) I basically been locked out of claiming and building wonders.

There was a third thing but I'm not sure if it's a bug. After I reclaimed my lost territory and tried to reattach them to my cities I got a "this action is prohibited" message from the game, so they stayed outposts from that moment on right in the middle of my empire.

Feedback:

*The game in general feels great and unique. I like how you can create your own nation in many ways by adopting differnt cultures throughot the game, it;s a good, flexible system opposed to the traditional rigid "this is your nation, here's your bonuses, get on with it" approach. 

*I also like the war effort system. Again, it's pretty flexible and allows you to win a war without ever having to siege an enemy city. Just by being smarter superior in numbers, chosing your battles, terrain wisely you can force a peace.

*I'm not sure I like that nations can force their civics on me or at least not as often as they did. About every second turn there was a popup telling me that I either switch or else....I pretty much lost the option to choose my own civics and shape my nation the way I wanted it because of that. All my choices got overwritten by a nation I haven't even met.

I think placing districts and expanding my cities that way is great but not sure why the harbor (which can and often will be placed far away from your city center does not allow district placement  around it? I find it unrealistic ( I know it's a game but still) and quite annoying that I HAVE TO build a line of districts just so I can build some  marked districts around my harbor in order to activate the bonuses. I don't see why is this a thing?

*I'm also not sure about the stability system. It feels like an afterthought, just so we have a bigger building variety.

*I may have missed something but faith was very confusing to me. I had no idea what's going on. After however many turns I got a popup saying I can found my religion ( I have no idea why) and then there was this coloured map telling me about influence and buildings with faith...etc but I had no idea about what the connection was in between these things or how can I improve or spread my religion if that's even a thing in this game.

*I've mixed feelings about the culture choise system too. What basically happens is that whoever advances in the next era gets to choose out of all the cultures available.Whoever advances last will have to chose from the cultures what's left wheter it suit's their playstyle/playthrough or not potentially putting them even further behind since they had limited options to choose from opposed to the ones that already leading.

And last but not least please do something about the bloody horse archers for the next opendev  if there will be any, because they are ridiculously broken. 1 Hun horse archer on high ground can kill a 4 man army of spearmen and archers without breaking a sweat. My whole army got obliterated by 2-3 of them and that's why I lost the war. I also won against them right after I became Mongolian in the next era and got the exact same units as the Huns (they became Romans) but stronger so I killed every single unit of his with my horse archers. They are a joke and honestly, almost stopped my playthorugh because of them.

I'll update this feedback after the 2nd playthrough