The general consensus in the previous changeset is that an area like the east part of Hilltop Hanover can not be leisure=park. That is why I changed it to leisure=nature_reserve. Following the "front of park"/"back of park" scheme, the outer border here would be boundary=protected_area perhaps with leisure=nature_reserve, while the farm section would be tagged separately.

Again, I would like to see a tagging scheme that works better for these borderline cases, rather than calling the whole thing either a leisure=park or a leisure=nature_reserve. But currently, it seems like this is what the consensus is.