1.20 Villager Changes & Nerfs

In 1.20 the update, villagers have been nerfed which makes it harder to get rare items such as mending books and other enchantments. It has also been made so that villagers can only be zombified and cured once for a discount, while previously you could do it until the villager will give you things for super cheap. This made me angry, since I have just gotten back into Minecraft and want the old system back without the need to downgrade my world potentially risking some items dissapearing or other errors occuring. I wish for there to be a gamerule which allows you to get the old villager trading system back. Thank you