The dev team still works on it from time to time. I run the Linux version and it has zero bugs, really. It does have some text that could be placed better on the screen and I'm hoping they add the features that I requested.
Tracers are the big change. You can see them on the big map.
Also, the sounds! I like the new sounds but it's a big difference. He encoded them a new way too, but I can't remember what the dev team said about the difference whether it's faster or whatnot. The sound files are definitely smaller though.