at least in the late eras, it gives as much attack as 1.5 wheat fields - that is 9 squares... leaves 7 squares for 15 previous goods and 5 fp - that sounds quite decent - might even consider it high tier - especially as it does not need any upgrades at all
I've got it at ~1.56 efficiency in Venus if you want everything it does. Which is only a little worse than fall fields if you're favoring a balanced approach. But fall fields is primarily favored by those liking a targeted approach - and it's significantly behind either the best FP or best attack fields layouts for people who favor targeting one particular stat (especially in not-SAV targeting attack)
Its competition for the balanced approach is significantly ahead of it as well - Eagle Reserve, Wolf House, Great Wheel, Pirate Hideout, Governor's Villa - all way ahead (ranging from ~1.88 to ~2.26). And at least a half dozen more that are also significantly ahead but not by quite as much.
The one way it shines is that it's potentially cheap to get a lot of - if specials aren't too hard to come by in this event.