UA exists to make each civ more specialized in certain things, I think it's OK. And actualy, you are ensured to get at least few artifacts/landmarks - if you keep your borders close until archeology.
What annoys me about this UA is that it's unreadable - there are so many bonusses. I'd change those various yields into one, for example +X

from GWs and +Y

from landmarks. Much more specialized and aesthethic.
Agreed - I'm fine with the current theme, I just wish it were better implemented.
I prefer, for example, JFD's version of Egypt where you can a production rush every time you capture a capital. It wouldn't be balanced in CBP I think, but it's a more consistent bonus.
Most UAs/UUs/UB in the mod ARE overcrowded, I don't think it's a particular problem to Egypt. It comes from balance issues. (Compare how simple they are in vanilla vs CBP... you have three times the lines of text.)
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Civilization - The Celts
Map - Continents, Standard, Epic speed
Victory Type - Science
Relative Rank - Harder (Deity)
Outcome - Challenge
Info - Tech Trading OFF, Research Agreements enabled.
Summary -
Relatively uneventful game, and that is why I won.
Division of continents: Netherlands and I; Indonesia, Byzantium and Ottomans; Aztecs and Arabia; Inca.
William had unfathomably defensible positions, surrounded by jungle and mountains, which made it impossible to wipe him out early. Nevertheless, I opted to block him out from expanding with a few well-situated cities, and played very friendly-friendly from there on, so I didn't have to wage wars.
The second group were at coast-distance from us and Theodora, stuck in a corner, started DoWing all her neighbors, for expansion purposes I imagine. Needless to say, she had been wiped from the map by turn ~150 by the Ottomans! Not before spreading her religions to half the Globe, however. Eastern Orthodox missionaries from three civs and half a dozen city-states were flooding my cities like plague, and I had to resort to defensive religious play.
I managed to snag a LOT of wonders ancient/classical (ToA, Stonehenge, Pyramids, Great Library, Hanging Gardens), and picked the +5 science/culture/gold in cities with specialists pantheon. It really helped me keep up in techs and policies.
The sum up the rest of the game: constant wars all over the globe; three civs going for a culture victory and therefore blocking each others out; not one patronage/diplo civ, which means very even diplomat counts in the WC; no clear runaway civ; I decided early to go for a science victory.
William and Montezuma were first to pick an ideology - respectively Freedom and Order. I was third and picked Freedom to keep friendly relations with William who had a very menacing army. Started getting scared when he went rationalism, stole Porcelain Tower from me, and got a few tech leaders starting in industrial. I bribed him to go to war against the Aztecs, the other big sticks, hoping that it would slow him down, and it worked pretty well!
I beelined for Hubble Telescope, then bulbed for the Apollo Program (the Netherlands beat me to it by one turn, ah!), and from there it was smooth sailing. I had a massive faith reserve (~35k) because I couldn't finish Rationalism to buy scientists. I really focused on culture/writers in late modern/early information era to make sure I could both finish the tree AND get the to the last Freedom tier.
William and I swapped ideologies for Order when the pressure became to heavy (so much for attempting to get the Freedom spaceship parts policy!), and Indonesia -autocracy with the Ottomans- declared war on me, but they already were at war with the four other order civs, and thus didn't pose a threat.
The turn timers had become unbearably long, think 2+ minutes each, therefore I ended slightly before actually winning. The waiting was turning me insane. I know I couldn't possibly lose by then, but think of it as you will.
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The Celts are fabulous!
The alternative pantheons are -on average- significantly stronger than the regular ones, although I'd consider throwing out the per pop ones, because deciding so early whether you'll be able to spread your religious easily is extremely premature. I would never pick those. I guess a very dedicated could make it work either way, though.
The UU is perhaps the best in the game, balanced out by the average UB which only shines for late game culture bombs.
The civ does fall off, but hopefully the early advantages will have compounded by then. Very well-suited to a cultural victory, with tradition-piety-aesthetics.
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Note to the boss: I have no logs -sorry!-, but completing the Manhattan Project first did not grant me a nuke (I already had a public school). Neither did completing the Order policy granting %GP generation and a Great Engineer give me the GE.
Just throwing that out there.