I decided to start an Egyptian game to first see if I could complete the UHVs, and then to see if I could survive until later in the game.
The UHV was lost when China got the Sphinx, so I decided to see how far in the game I could go without dying.
I'm playing on Monarch in the fresh 1.12 version.
My stability simply sucks! I got -5 happiness in the domestic tab, for no apparent reason. I say that because checking the stability guide, nothing tells me why I was losing 5 points due to happiness.
Each 3 turns it sees how many happy and unhappy cities I have, then it decreases my score if I have more unhappy then happy, increases if the opposite, and slowly goes to 0 if even. Well, I had only 1 city for most of the time. It never celebrated we love the king, but if there was a time where I had enough non-pop

to make my city an unhappy city, then it was only when I needed a whip and just after it I had an herbalist event. This didn't take long to fix, and Egypt being Dynasticism since beginning, and with at least 2 troops inside of my city all the time, my happiness was always far superior then unhappiness (which must have made my city a happy city while I had this +3

from other sources).
This -5 stayed on for a really long time, only starting to fade in the times of the roman conquests, when I finally made my second city in my historical area near Ethiopia. It's on -3 now that the arab have just spawned. Even so I think there is something really wrong with this part of the stability mechanic.
Also problems with relations, isolationism and borders were always crippling me even further. I only knew the state of Shaky, and I almost got to Unstable.
Another thing I noticed is that 2 Flood Plains turn into desert in Upper Egypt. Is that really necessary? Will that make any difference towards balancing? Egypt is already crippled by the fact it can't make Farms in most of its core and historical tiles, so the only thing you may have are Cottages (you'll probably only get watermills after those tiles became desert), and these will keep in place, even though you can't build cottages on desert tiles. That just to lose 6

. Is that really necessary? The only thing I could think at the moment was: Great! Another thing to cripple my game. With such a small Core Area, also small Historical Area, the impossibility of making farms in most of its territory until Biology, the obvious lack of

in Egypt as a whole, does Egypt really needs 2 tiles to lose a total of 6

? I doubt Egypt was op before coding this removal, and I doubt any conqueror of its area would become OP because of 2 extra flood plains.
The last thing that caught my attention was the arab flip. I restricted my expansion until the arabs because of the flip. I thought all my core would flip. But then there was no flip, some tiles became neutral for one turn, but no cities asked for flipping. Is that because the capital can't flip? (it was the only city I had in the flip zone on the flip map of DoC) or did the flip zone changed over the updates but the stability map didn't?