Yeah, they nerfed the amount of fame gained doing repeat quests at the same time they changed the rules for the quest that gets you the map to Crawler's Nest.
When I did the CN map quest, did it in a day, now, however, I don't quite recall if you have to wait one RL day, or one game day to do each successive tablet.
I do know that the shepherd quest in selbina, it used to take like 15 stacks of boyahda moss to gain lvl 6 fame, now, you have to double that to obtain even so much as lvl 3 if starting from zero.
It still can be done that way, just tends to be costly or time consuming with little to no reward. The singular quests, on the other hand, reward you with decent gil and or gear.