I feel that the spike pit while could be practical in a different setting, has no valid point, especially as the invaders can walk around it. I also found the shapes of fields too uniform and grid-like, there's no field that isn't following the same way. Everything has a neat, orderly direction, no angles or awkward shapes. it doesn't feel realistic. I'd highly recommend looking at how some other Reach builds nearby have plotted their fields. I'd also suggest adding vegetable gardens to all the hamlets, and pastures for livestock. Villages with 'bad' soil should have cows or sheep since grass grows almost everywhere, but there should be several livestock areas as is, and added wheat and oats and whatnot to help sustain them in droughts or winter. And I'm unsure what project the forest belongs to, but maybe having a few mature trees in the outer ring would be nice. It's odd that there is only new growth all around it. Also some coppicing areas and windbreaks for fields would be good, they provide vital mini-habitats for wildlife and help reduce field exposure to harsher winds.