Ok, i opened it, the mountains were fine, but after experimenting in mission editor, i came up with 3 suggestions:
1. IMO it looks much better with a different grass texture
Normal:

My editted:

2: You may want to put some rocks in bunches insted of on their own.


3: There are some horribly bulgy mountains on one part :Þ (I dunno if this was fixed in v4?)

Hope that helps ;D