I believe if you chop down a tree and it's log falls on a structure, that structure should break or get damaged. If you chop a tree and the log falls on another tree, the log should land next to the tree. If you chop a tree and it lands on a cliff, the logs should roll to the bottom of the cliff onto the nearest open tiles. If you chop a tree and it lands on somebody, instant K.O. Last, directional chopping. Right click tree > Chop > North, East, South, or West
Also, please make trees continuously try to grow. It's a pain when they just stop because they get blocked and can't advance to the next stage.