Some more crits: I'm not an environment artist, but I recommend putting more into your diffuse texture. For all their declamations on being painterly at ArenaNet, they were never shy about using photos and grunge to really give textures interest and impact. Maybe also look at some oil slicked rocks or something like that…
@ nordahl: I retopoed the wall in Max, it probably would have been faster in zBrush. Then used xNormals to preject high poly details. I moved recently, so I haven't had time to work much, but I'm dying to. I've started taking on the crits I got. Haikai, I got some tiling diffuse on it to get some of the rocky texture…