1 - Here too, you have loads of hovering doodads. Here are just some of them:
You can lower them with Ctrl + Pgdn, but I guess you already know that, or you can change that in some other way.
2 - Also some of the doodads that shouldn't go through each other, are going. For example, in that first screenshot I've put here, the treetop is going through the hovering glacier, etc.
3 - Those huge icy rocks you are putting everywhere are really cluttered at some places and look ugly, you should remove some of them and rarefy their placement.
4 - In-game the normal game camera goes through the rocks, and the rocks obscure the view at some places where they shouldn't. For example, here is the entrance to the Lich King's throne room from in-game view:
I guess you can change that yourself, or the people who will be using this template can use a higher in-game camera for the map.
5 - The open areas have next to zero terrain tile variation. For the most of the map you are using only two terrain tiles, that white ice and snow tile. There are many more terrain tiles in that tileset with which you can enrich those open areas.
6 - Here too, you need to Calculate Shadows.