Please make it ignore player(s) and rail signals when determining if it is valid to place. Also, it isn't very intuitive when determining if you are placing a loader or unloader. Lastly, when placing a new station, though it shows 4 loaders you can't click place loaders without using the - minus 4 times and then + 4 times, or it thinks it's trying to place the previous station that was placed.

Also need to ignore gas, like poison gas used to clear trees that it also has problems with. As is, you have to wait until the gas dissipates.