A single tree at that point could only make a single wood piece (wall, foundation). That is stupid low to say that we can build guns, we can build boats, we can tame Dragons...However, we are so horrible at gathering we cannot figure out how to make one tree make multiple walls? I don't think anyone would complain about 4x being the default it feels more in line of what I would think a good balance time spent harvesting and the mats received. That is my opinion and I cannot or will not speak for everyone in that regards though.