The recent update stated:

"The discount for curing a Zombie Villager no longer increases when the same Villager is reinfected and cured multiple times"

However, it appears that discount for curing a Zombie Villager no longer benefits the other villagers in the Villager.

Previously, if i had cured 3 villagers, then those 3 would each have significant discounts, and all the other villagers in town (who were not cured) would get 3 small discounts. 
Now there is no benefit to the rest of the village if you cure more than one other villager.

This has ruined multiple multi-year realms that had nice trading halls.