Due to their being no real terraforming:
1) I think the palisade height should be increased by around 20%. At the moment when building on a slope of mountain side they can easily be cleared by jumping from a slightly higher ground level.
2) Foundation level could also be increased or a way to build a foundation lower to build another foundation on top. As there is no terraforming it is very difficult to build structure in sloped areas such as a mountain side.
Great game though guys I'm enjoying every second