I have just bought RailClone Pro and I must say that I love the plugin, very nice job you did on this one, makes my life so much simpler and the price was very good for me as a private home user.
Something I wish for is maybe a bigger library of files to be used, you have about 80 now, but most of them are fences and handrails. I wish there was more roads, different types of lights, maybe objects to create bridges, tunnels and so on?
Also, one feature that I read will be added is T-junctions, very welcome feature so you can build crossings and so on.
That is all I can come to think of right now, but keep working on this plugin and add more features to it, it's a very great plugin!