My fault on german UP, it works. Germany has a +50% modifier, and 150 - 25% = 112.5, just what i had in costs. The only problem is, that the costs in the civiliopedia are others then in the game.
A lot of civs has a 150 modifier for units, why not change all costs and give them 100.. too much work? Maybe for the final version, when balancing is finished.
I also took a look at all the balance things, i understand most of them: old civs like Byzanz and Arabia have higher costs, new civs like Sweden and Dutch have lower costs. Thats very good.
But why is the culture for Turkey, Sweden and Dutch lower? The Dutch need double the culture for a border pop, why? Also, different costs for units and buildings is supported by the UI. But not with culture. With dutch, i used artist specialist with Divine Monarchy (+6

), i reads 0/+6 in the culture window, next round there is 3.5/+6.
That realy looks like a bug (i think i already reported this in my dutch feedback a week ago)
Different building costs are ok, but i dont unterstand it with culture (Only double culture for Rome is needed, else the Byzanz UHV wouldnt be a challenge)
Next thing are the AI-AI relations:
Arabia-Cordoba and Spain-Portugal being natural allies is understandable, but why have France-Burgundy the same +8 modifier with each other? In older versions i remember that France often conquered Burgund, havent seen this happening in my last games, no wonder if they are friendly from the start.
And at last: there is still the 3rd german UHV thats not working, should be in 1540, but it says
not yet even after it, i played till 1562.
Btw, i realy like that the german UHV is finished before Holland spawns, so you can use their land for 2 good cities.
On the workers:
No danger for workers here, the AI rather builds some farms and Mines instead of improving its iron,horse and salt. Its over 300 years after spawn! And the single worker rather replaces a cottage with a workshop... working the mined iron would be far superior then this....
But it almost looks like today Austria
