Please try to tint down those bright trees, they look awkwardly ugly-licious right now.
You better add a center of focus Chen, perhaps you could make the ships to be that since you're aiming for Thrall's Exodus to Kalimdor.
Just stick with the zerus cliff instead of the mix between that and the felsen rocks.
There are way too many trees on that cliff overlooking the ship/s, better decide to go with something easier, as Keiji would say 'less is more'.
Also you gotta fix that water plane issue on the lower center part, looks alien-ish as of now.
Speaking of the sea, might be a good idea to add some kind of rowboats or ship debris, you know like something happened to the ships while leaving Lordaeron/or whatever land they came from.
As well as what I've said above you're also in need of some kind of background even if slightly mimicked, plus some better cloud work (maybe glows instead of them) to add further depth to the terrain.
Overall keep up the pace.