I have studied this case recently. Certainly, the text in second edition has changed. I hoped it was a errata. pay 3 golds to get 2 cards is a bit expensive, ok. But it can be useful, it saves me a pair of games. But if want to empowered de Factory, is more than enough pay 2 golds to get 2 cards. If yu get 3 cards for only 2 golds, it becomes all-powerfull. better than all the others draw Districts. Why need you a Library to make an action to draw 2 cards or an Observatory to make an action to draw 3 cards an take 1 if you can make an action to get 2 golds an invert this golds in take 3 cards with the Factory?
It left the other cards obsolete. I can allow here a District with less cost value be better than a District with more value (Factory Vs Library). I Actually thinking taht Bruno is getting old...
Achiles(X)