UPDATE! The patch is finished, version 0.5 is available! I noticed no bugs yet, but there might be some. Download it below. I'll post a compiled version soon (Windows) - ADDED
---------------------
After playing a long game I came up with the following idea:
I think it would be a good idea to improve the "Level land" tool. Now the tool is only able of making square selections. My idea was to enhance the tool so that when you hold control when dragging the 'square' will be rotate by 45 degrees. So that the land that can be selected is like a vertical vertical line. This drastically improves the easy to work with vertical pieces of track.
I've attached images to clearify this. The first is the normal selection, the second image is when holding control down. It could also be implemented for the dynamite tool.
I also tried to code this myself, bu the code is not (so) good documented to get the hang of things easily

And I would like to add that OpenTTD is really great and I hope it will become even better
