Lighting is absolutely key.
Also, dramatic perspective and composition can help a lot. I've heard lots of "rules" for getting better photos. One that I have heard is, "Get higher." Another rule I often hear is, "Get closer." Both of those may be good suggestions, depending on what you are after, but sometimes doing the opposite may actually work better. My advice is that if the scene is beautiful to your eyes but mundane through the lens, you might want to think about whether you need to try getting higher, or lower, or getting wider, or narrower, or closer, or further, or moving to the right or the left, or try getting it at a different time of day, or in different weather conditions, or in a different season.
You certainly have the elements for a great photograph here. The colors are lovely, the mountains are majestic. The overcast sky, however, though it could work for certain effects, is not the best for this capture. It makes the image look a bit flat. In general fall colors look best when set aglow by the sun and contrasted against a blue sky. Also, the perspective here is just sort of mundane.
Under these conditions you might try getting closer to the trees, trying to find some arrangement of colors, shapes, and lines that felt more dynamic. Or you might have tried moving further away to try to find a higher vantage point, one which allowed the mountains on top to be clear of the dead branches. Perhaps including an element in the foreground would give greater perspective. Aside from all of this, though, the sky conditions are just not ideal for this sort of dramatic autumn scene. It probably would have been a better day to photograph waterfalls and leaves.