HI there,

I love your montain and general terrain ajustment you've made.

Hope to see a tutorial here soon .

I think for my part that I would drop the lake contour and make it like the sand is taken over by the water (more realistic).

The other problem I see is with the forest, there is too much spot and not enough continuity, it look more like an army camo suit than a forested map.
Maybe try to make some more define forest that could go around the mountain an on top of them in some places.

Make sure to post the final version too,

Alu.