I don't overly mind the fate grind personally, but I feel they should have put more thought into it, maybe have some yokai's asking for monster kills, some asking for lower dungeon clears, some asking for item fetching (maybe akin to the no-hint quests, where you have to think and figure out where the stuff they want might be, no map markers are given) etc. Making it ONLY a fate grind for all of the Yokai seems kind of.... lazy imo, and doesn't really give an idea of what the related series is about, different yokai take different things to befriend.