Well, 15 gems + time (totally negligible in this case, as you guys already said) for 1k gold or 60 gems for 1k gold = reasonable to me (again, not as a buyer), having their rates as starting point, applying the logic used by them. The gold per gem value only increases as you get bigger books.
I’m not sure, but no one here would let that wizard staff for 40k gold go away, right? Most would not let it pass even if it’s being offered for 2k gems. So tell me, if 4.5k gems = 100k gold and you don’t have enough gold, but you have enough gems to get the 100k pack, would you let it pass to have a chance every 2 weeks to get it because you have an extra chance for 500 more gems? If you do, you are not the people Ludia wants to please at all. Regarding the rates, I’ll go further: buy the 800 gems book, farm the cake out of it wherever you see fit and have enough gold to get the item offered when it appears for expending 800 gems, and have 10k gold as change. There are pros and cons for every approach, but people that aren’t able to farm for extended periods of time or don’t want it/aren’t able to do efficiency/don’t have enough knowledge about the game, but have the available resources at the moment an offer appears consider these kind of tradeoffs.
Lastly, I was not trying to open a debate if the nerf was fair or not - I was asking if: having a starting point that books are now the way they are and they will not change, it would be positive if the devs increase the expiration time on em.
Sorry if some words may sound rude, but my lack of skill with English limitates me a bit when formulating ideas. If someone feel offended with my arguments, please don’t, because it wasn’t my intention to offend anyone.