>>465571421. The height you added doesn't correspond with the lake edge. Either build it up or remove the extra layers.
2. The cliff wall is a little abrupt. I suggest stepping it or adding more trees.
3. The layering is wrong. Add a front section so it doesn't look like it's floating and step it so it leans up.
4. Again, the layering is wrong. You've added peaks that don't correspond with their ground levels.
5. Just move that edging down one space from the top plateau for a smoother gradient.
6. Line up the levels to follow the same patten.