Ok guys and girls,
First of all, I want to thank N3V for letting me test a fix.
I've just tested a fix from N3V, and even though this is only just my experience with it, what I can say is, the fix has fixed all of my redraw and performance issues!
Again, this is only my experience but N3V has restored my faith in them, as it's not only fixed the redraw and performance issues, but the performance also seems a lot better.
I have been very harsh on N3V in this forum thread, mostly because Trainz seemed to be going backward, and, I had to reinstall one of my installed copies (luckily, I have several installs of different builds on my PC) which takes a long time to do but I'm very happy to take back most, if not all that I said. They seem to have done a great job on the fix!
To sum up, things are looking good with the fix, and performance seems to have improved too. I hope others have the same experience and results.