It is not that bad but nothing really interesting. The light is not right which give a huge dark area in the foreground especially on the left hand side. This make the picture not in balance, it fall to the right hand side. Clearly Velvia is a wrong choice in this high contrast situation. Astia or Sensia would be more suitable.
Exposure is correct since the tree trunk in the middle has good details.
Any more exposure would ruin it. The sky is dorminant but boring without any cloud and the two tree trunks lead your eyes to this uninteresting area then through the gap between the tree at the top middle and out of the picture. When you try to re-enter the picture again through this gap, your eyes keeps wandering around the tree tops and the sky between them without going back to the more interesting tree trunks. Try to use a paper and cover the top of the picture such that the top of the frame just touch the top of the tree in the middle. This keep the viewers eyes inside the picture and circle around the two tree trunks.