Make the happiness meter play an effect on a characters learning ability. Unhappy, less LP, happy, more LP.
Most task that players grind/macro are repetitive tasks that no player thats playing to be productive would do that much. Digging, making wickerbread baskets, stuff like that all already make you unhappy. Make that reduce the LP you gain
Task that should increase your happiness are farming (to a certain extent (maybe an upside down parabolic function to reduce people from making huge wheat fields just for the LP)), hunting, silk making, leather making, taming animals, productive stuff that takes more time and is not so repetitive.
Also, return previous LP values of tasks such as looms, digging, everything like that that was nerfed back to normal. Players doing these tasks normally should not be penalized for other players (like me) abusing it.
Thank you, I know I'm brilliant, I'll take a wizards cape.