So I'm exalted with Tillers, all 16 soil plots are unlocked, and I have Yoon as a voted-in member of the union (completed that quest chain). After all this, there is a quest at the Sunsong shrine that asks you to become best friends with a Tiller, and have them join you on the farm. I'm BFF with every Tiller and apparently you can only have 1 Tiller at your ranch at a time.
The question I have is: what the hell do they do?! I can't discern what each Tiller does because I can't discern any difference on my farm regardless of who is there "helping"! I've had Haohan there for about two days now and he has produced nothing. Is this a bug, some kind of strange companionship vanity, or am I missing something? I'm very curious.